The mean weight of 45 boys is 65kg and 37 girls is 45kg and that of 5 teachers is 70kg. What is the average weight of the whole class included the teachers?

Answers

Answer 1

Answer:

The average weight of the whole class is: 56.78kg

Explanation:

Given

[tex]\bar x_{boys} = 65[/tex]

[tex]n_{boys} = 45[/tex]

[tex]\bar x_{girls} = 45[/tex]

[tex]n_{girls} = 37[/tex]

[tex]\bar x_{teachers} = 70[/tex]

[tex]n_{teachers} = 5[/tex]

Required

The average of the whole class.

This requires that we calculate the population average

This is calculated as:

[tex]\mu = \frac{\sum n_i * \bar x_i}{\sum n}[/tex]

So, we have:

[tex]\mu = \frac{45 * 65+ 37*45+5*70}{45+37+5}[/tex]

[tex]\mu = \frac{4940}{87}[/tex]

[tex]\mu = 56.78[/tex]


Related Questions

Read the following sentence:
I am.
Which revision below includes a prepositional phrase?
Here I am!
O I am here and alone.
O I am in here.
O I am alone here.

Answers

Answer:

Hey mate!

The right answer is Option BO I am in here.

The reason this answer is right is because it contains the word 'in' which is a preposition, so that makes it a prepositional phrase. The other sentences do not have prepositions so the second option is the right one!

A sentence including a preposition is a prepositional phrase. The second sentence, I am in here, is the prepositional phrase. Thus, option B is correct.

What is a prepositional phrase?

A prepositional phrase is an element of the sentence that includes prepositions like by, at, for, in, on, before, between, etc. The phrase starts with a preposition and ends with a pronoun or a noun.

In the second sentence,  I am in here, "in" is the preposition while all the other revision lacks prepositions. It is a prepositional phrase as only it includes a preposition "in."

Therefore,  I am in here contains a prepositional phrase.

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Hurry Please answer im struggling!!

Answers

is it pathos and ethos

I don't know

I just answer nothing

it's soo hard

sorry if it's rong

In the article, Michael Morris says that Wilde "feels very modern; his aphorisms
and epigrams feel like they could have been written yesterday.”
What do you think he means by this? Is it a compliment?

Answers

yes I think it’s right because it’s saying that it doesn’t get old and it feels like it was just written.

Date: 4/7/21

Class: English

Points: 40

Brainliest: Only if Its Correct and if its the best answer

Thanks: Only if it makes sense.

Rate: Only if it helps me/others!!

Answers

Answer:

Two examples of onematopeia are "spilsh spalsh" and "clicks."

Explanation:

These examples make it easier to read the story, as the reader is able to understand what sounds are occuring and what the events sound like. By using this tool, the author makes it easier for readers to relate to the story and feel more like they are in the story.

Thank you for the opportunity good sir, and Go Pack Go!

Answer:

#1, "Splash! Splash!"

#2, "Clicks"

Explanation:

#1, This helps by telling the reader how dolphins sound like when they flap it's tail

#2, This helps by telling the reader how the dolphins sound.

how pitch and wavelength related to each other

Answers

The shorter the wavelength, the higher the pitch.

Which of the following are fuels that can be burned to create heat?
all of the above
wood
natural gas
charcoal

Answers

Answer:

All of the above. Wood, Natural gas, and charcoal can all be burned go make heat.

Answer:

All of the above!

Explanation:

But when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new Guards for their future security.—Such has been the patient sufferance of these Colonies; and such is now the necessity which constrains them to alter their former Systems of Government.

–The Declaration of Independence,
Thomas Jefferson

Based on the passage, what is the purpose of the Declaration of Independence?

to provide a set of rules and regulations for the United States
to justify the American colonists’ desire for freedom from British rule
to establish new settlements and colonies in America
to encourage England to become a democracy


THE 2ND OPTION

Answers

Answer:

its B

Explanation:

to justify the American colonists’ desire for freedom from British rule

The purpose of the Declaration of Independence is to justify the American colonists’ desire for freedom from British rule. Hence option b is correct.

What is freedom?

Freedom is defined as the condition of being free or at liberty as opposed to confined or physically restrained. Freedom is significant because it enables us to exist without being afraid of or subjected to oppression by others who would use force or coercion to enslave us. Freedom is a fundamental human need and a key component of social interaction.

The document's second section explains how King George III had violated those rights in order to impose a tyranny over the colonies and lays the groundwork for American independence. We sincerely believe that all individuals are created equal and that their Creator has granted them all of these rights, including the right to life, liberty, and the pursuit of happiness.

Thus, the purpose of the Declaration of Independence is to justify the American colonists’ desire for freedom from British rule. Hence option b is correct.

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6. You have to wear a uniform to school, and you don't want to.
I wish we.
......

Answers

What ??? Can you elaborate

An article on rain forests is divided into four sections with the following headings: Climate, Forest Floor, Plant Life, and Dangers. In which section would you find information about the average temperature in a rain forest?

A. Climate

B. Forest floor

C. Plant life

D. Dangers

Answers

Answer: Climate

Explanation: I believe you would find the avg. temperature f the rain forest in the climate section. When scientists talk about climate, they're looking at averages of precipitation, temperature, humidity, sunshine, etc.

Hope this helps :))

John Henry got into a competition with the machine, to save the jobs of the railroad builders. What happened as a result

Answers

Answer:

The challenge was on, “man against machine.” John Henry was known as the strongest, the fastest, and the most powerful man working on the railroad. He went up against the steam drill to prove that the black worker could drill a hole through the rock farther and faster than the drill could

Explanation:

When making connections across two texts, you should look for _____, the supporting details, the author's purpose, and whatever they have in common.

A.
the author's point of view
B.
the main idea
C.
the organization
D.
the author's voice

Answers

B - main idea

Of the texts

Please give me the correct answer.Only answer if you're very good at English.Please don't put a link to a website.​

Answers

Answer:

The answer would be B. To show the relationship between Mubarak's action and the results of the crackdown.

Explanation:

Cause and effect is the relationship between two things when one thing makes something else happen.

In the last sentence of the first paragraph, the author repeats the word "presumably" in order to
A
portray the difficulty of assessing the moral quality of a nation's actions
B
remind the audience that they cannot be sure they understand people's motivations
undermine a view that he will go on to dispute in his argument
D
emphasize the vast power imbalance between those fighting in the described conflicts
E
caution his audience against forgetting the importance of a nation's sphere of influence

Answers

Answer: C

Explanation:

Presumably undermines because it says it isn't as they say.

In the last sentence, the repetition of the word "presumably" has the following purpose:

B. Remind the audience that they cannot be sure they understand people's motivations.

What does "presumably" mean?When we use the adverb "presumably" in a sentence, we wish to show our audience that what we are talking about is probably true, but it is not certain.For example, suppose you think the president of your country will issue a statement concerning the most recent act of violence that took place. However, you are not sure she will. You may say, "Our president will presumably issue a statement on the topic."With that in mind, we can see that the only option whose purpose is related to the meaning of "presumably" is letter B. The author is making it clear when he repeats "presumably" that we cannot be sure of people's motivations.

Learn more about repetition here:

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What does “the wind is filled with laughter and cries” mean?

Answers

i tried answering this for you but it told me i was being rude and could not answer this lol

coral tulips are the animals primarily responsible for building reefs. true or false?

Answers

Answer: false

Explanation:

What is the definition of media literacy?
A. Media literacy is the ability to read books aloud.
B. Media literacy is the ability to create media for your computer.
C. Media literacy is the ability to put together a bike using the instruction manual.
D. Media literacy is the ability to "read" critically the messages behind the various media with
which you interact on a daily basis.

Answers

Answer:

According to me it should be answer D; Media literacy is the ability to "read" critically the message behind the various media with which you interact on daily basis.

Hope this helps!

The answer to the question is D

This a simple sentence: The cat and the dog ran and rolled around in the yard.

True or False

Answers

Answer:

true

Explanation:

Answer:

true

Explanation:

cats and dogs always run around the yard

I COUNLT FIND THIS ANSWER ANYWHERE PLZZZ When you start paying back loans, what's the first thing you should pay?
A
the interest

B
the principal

C
the work study

D
the FAFSA

Answers

Answer:

the interest is the correct answer

Answer:

a

Explanation:

Choose the predicate(s) and subject(s) from this sentence: A drowning man was rescued by two campers.
Will mark brainilest. it’s due in 11 hours. Thanks! :]

Answers

Answer:

The subject is: A drowning man, and the predicate is: was rescued by two campers.

Explanation:

A subject is what the sentence is talking about (who or what). In this case, it is a drowning man. A predicate is a part of a sentence that is stating something about the subject. Therefore, the predicate is: was rescued by two campers.

H E L P- worth 85 points- will give brainliest-
3. What are some values that are important to the people who live and work in the new nation? List at least three values and illustrate their importance with evidence from at least three readings. You should have at least one complete paragraph explaining each example. Discuss each example in its own complete paragraph.

Answers

Answer: Some values important to people in the new nation were individualism, to be respected, and self reliance. They had no care in the world for people that didn't have these character aspects. Resources Brainly.com, Vintageamericanways.com, and coursehero.com helped me understand that people that weren't respected would not be listened to. They also wanted them to not have too many friends, and to rely on themselves for answers they needed. They found their information from researching instead of asking, so that their answers were always correct. Not rumors.

Explanation:


What question requires you to determine the presence of evidence from a reliable source to support its claim?

Does the website have pleasing graphics?
Who's behind the information?
What do other sources say?
What's the evidence?

Answers

Answer:

what's di other sources have to say about it.

Select the sentence that does not follow the style guidelines.
I'm amazed at what Felecia carries in her purse: a wallet, her
identification, and money, of course. There are also
unexpected items, such as mouthwash, a sewing kit, and
dental floss. She claims to have used such items for: planned
events and surprises. Felicia is ready, willing, and able to
lend the items to others.

Answers

Answer:

She claims to have used such items for: planned events and surprises.

Explanation:

The guy above me is correct^^ The answer is: She claims to have used such items for: planned events and surprises.

yw<33

What is the meaning of the poem ""When my noisy mind quiets"" by Georgia Heard

Answers

Answer:

The poem shows that in times of stress and mental confusion, we must provide a moment of relaxation capable of making us comfortable with ourselves.

Explanation:

By reading the poem we can see that the speaker presents the idea of stress, mental confusion and discomfort with himself through a noisy mind. When this happens, the speaker needs to be quiet in a place that allows him to be relaxed, to breathe calmly and to establish a friendship with himself, bringing a necessary comfort and calm. We can see this through the lines:

"I leave all my to do’s/ in a place/ asleep like winter trees./ Then I become friends"

The author mentions common name brands in the first paragraph most likely to -
introduce the reader to the main idea of the selection
O offer an opinion to the reader about the topic
create a connection with the reader
define key terms for the reader

Answers

Answer:

create a connection with the reader

Explanation:

When a writer mentions common name brands when introducing a passage, it is likely that he wishes to make the topic relatable to the audience. This is because the audience will likely be familiar with those brands. This way, the author of the passage makes a connection with them.

The use of common names also has the additional benefits of helping the reader to easily remember the issue discussed and also apply them to their local environments.

Answer:

A

Explanation:

i have the same question :)

Bias can be defined as a blank something that benefits you were others unequally

Answers

Unfairness or prejudice can go in the blank

Bias can be defined as Unfairness or prejudice something that benefits you were others unequally.

What is the meaning of bias and prejudice?

Prejudice – an opinion against a group or an individual based on insufficient facts and usually unfavorable and/or intolerant. Bias – very similar to but not as extreme as prejudice. Someone who is biased usually refuses to accept that there are other views than their own.

What does show bias mean?

to show bias (toward sthg or by): to show favoritism or preference (toward something or somebody)

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What are the principals of writing a paragraph or text? Explain.

Answers

Answer:

A paragraph is a collection of sentences that all relate to one main idea or topic. Effective paragraphs have four main characteristics: a topic sentence, unity, coherence, and adequate development.

Which of the following Latin roots would help you determine that an
unfamiliar word is describing the return to the head of a persuasive argument
to summarize?
O A. Capit
B. Aud
O C. Corp
O D. Ced
i don’t knoooww :(

Answers

Answer: i am not completely sure, but i think it's A or D

Explanation: the latin root "ced" means go, this could mean going back to the head of an argument. the latin root "capit" means head, which could possibly be returning to the head of an argument. i know it is not "aud" because aud relates to sound and "corp" relates to body. i hope this somewhat helped.

Speed depends on both distance and direction.

A: True
B: False

Answers

Answer:False

Explanation:Velocity is a measure of both speed and direction of motion. Velocity is a vector, which is a measurement that includes both size and direction.

Activity
Research and read about the stress study conducted in Baltimore called "Shifting the Lens," which focused on stressors in African-American urban
teenagers. As a young adult, do you agree with the findings of the study and the stressors that it identifies? What are the main stressors in your
life? What do you do to cope effectively with stress?

Answers

Answer:

(Answers may vary)

Yes, I do agree with the findings of the Baltimore study “Shifting the Lens.” The study found that parents, family, and interpersonal relationships with school friends are the leading stressors in a teenager’s life. Most people believe that the leading causes of stress are problems with authority, peer pressure, drugs, alcohol, and so on. While this is true to some extent for many teenagers, most teenagers have a harder time coping with everyday stressors.

Some of my main stressors include family problems (disagreements with my parents about my allowance, chores, and curfew); my performance at school (I’m good at languages, but I struggle with math); my worries about the future (about what colleges will accept me); and my hectic schedule, crammed full of school and sports activities. My schedule can be hard to juggle and leaves me with very little personal time.

To cope with my stress, I have my family and my closest friends for support. When I’m upset with my parents, I talk to them about it. My friends have similar stresses, so they empathize. In addition to sharing how I feel, I’ve also found that hobbies help to take my mind off the stressors. Therefore, no matter how busy I am, I try to paint and read when I’m feeling stressed. Keeping a diary also helps me to process my thoughts and feelings. Sometimes, instead of immediately reacting to a stressor, I write down how I’m feeling. It helps me to vent as well as to calm down and rationalize my feelings.

Explanation:

Exact answer

Read the excerpts from Queen Elizabeth's speeches.
Address to the Troops at Tilbury Response to Parliament's Request
That She Marry
Let tyrants fear, I have always so For the other part, the manner of your
behaved myself that, under God, I have petition I do well like, and take it in good
placed my chiefest strength and part, because it is simple, and containeth
safeguard in the loyal hearts and good no limitation of place or person: If it had
will of my subjects, and therefore I am been otherwise, I must needs have
come amongst you, as you see, at this misliked it very much, and thought it in
time, not for my recreation and disport, you a very great presumption, being
but being resolved in the midst and heat unfitting and altogether unmeet for you to
of the battle, to live or die among you all require them that may command.
to lay down for my God, and for my
kingdoms, and for my people, my
honour, and my blood, even in the dust.

Which best describes a difference in the types of rhetorical appeals used by Queen Elizabeth in these excerpts
from her Address to the Troops at Tilbury and Response to Parliament's Request That She Marry?

Answers

Answer:

persuade the troops that this cause is so worthy that she is willing to sacrifice her own life.

Explanation:

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