A certain model car has a keypad with 5 numbers on the door. To open the door, 5 numbers must be entered in the correct
order and no number can be used more than once. What is the probability that someone could guess the correct code?
OA. Ito
OB.
OC.
OD.
Answers
Answer: A. [tex]\dfrac{1}{120}[/tex]
Step-by-step explanation:
Total digits on keypad = 5
According to permutation,
If repetition of digits is not allowed then the number of 5-digits passwords can be formed = 5!
= 5 x 4 x 3 x 2 x 1 [n!=n x (n-1) x (n-2)x ... x 1]
=120
The probability that someone guesses the correct code = [tex]\dfrac{\text{Number of correct codes}}{\text{Total possible codes}}[/tex]
[tex]=\dfrac{1}{120}[/tex]
Hence, the correct option is A.
Related Questions
What's the additive inverse of - 1/4
Answers
Answer:
+ 1/4
Explanation:
Additive inverses are numbers that equal 0 when added together.
-1/4 + (+1/4) =
-1/4 + 1/4 = 0
Which table could represent a function?
input -5 -4 -3 -2 -1
output 0 1 2 3 4
input 4 3 2 3 1
output 10 9 12 15 2
input -8 -6 -4 -2 -8
output 1 -1 1 -1 -1
input 10 20 30 20 10
output -10 -20 -30 20 10
Answers
Answer:
First option
Step-by-step explanation:
If each input value leads to only one output value, classify the relationship as a function.
Answer:
input -5 -4 -3 -2 -1
output 0 1 2 3 4
Step-by-step explanation:
Plz help!!! 10 pts..
Answers
Answer:
63 boquets were sold in the afternoon.
Step-by-step explanation:
Divide 90 by 10 to get 9. Then multiply 9 by 3.
Answer:
23.1 pounds.
Step-by-step explanation:
Multiply 140 by 0.165.
Elena is feeding her neighbor’s dogs. Each dog gets 1/2 cup of dog food, and she uses 3 cups of food when she feeds them. How many dogs does her neighbor have?
Answers
Answer:
brainliest please
Step-by-step explanation:
6 dogs because 1/2 cup per dog 6 divided by 3 = 1/2 or 2
so2 dogs per cup
Factor completely.
n^2 + 7 n - 44
A) (n + 4)(n - 11)
B) (n - 4)(n + 11)
C) (n - 4)(n - 11)
Answers
At Silver Gym, membership is $35 per month, and personal training sessions are $25 each. At Fit Factor, membership is $55 per month, and personal training sessions are $15 each. In one month, how many personal training sessions would Sarah have to buy to make the total cost at the two gyms equal?
NEED IT FINISHED ASAP!!!!!!
Answers
Answer:
8 personal training sessions, 3 from Sliver Gym and 5 from Fit Factor.
Step-by-step explanation:
Alright, write the multiples of and 25 and 15 until both reaches the same number.
25, 50, 75
15, 30, 45, 60, 75
I don't really understand the final part of the question, but I hope it helps.
3 + 5 = 8
3 from Sliver Gym and 5 from Fit Factor.
2.9 months to 4.9 months
Answers
Hi there!
For 2.9 months to reach 4.9 month, simply subtract both terms to find the result of months left to get to 4.9 months.
[tex]4.9-2.9=4-9+9-9=2.0[/tex]
Final Result: 2.0
8. M&M's cost $10.00 for 3/4 of a pound. Snickers cost $9.50 for 1 pound.
Milky Way's cost $2.00 for 1/4 of a pound. Which is the true statement?
M&Ms are the best buy
Snickers are the best buy
Milky Ways are the best buy
They are all the same price
Answers
Answer:
MILKY WAYS
Step-by-step explanation:
Answer:
Milky Way's are the best buy.
Step-by-step explanation:
Milky Way's Cost $8 a pound.
Snickers cost $9.50 a pound.
M&M's cost over $10 a pound.
The trend line passes through (10,9) and (35,0). Write an equation for the trend line.
Answers
Answer: Solution :
Step 1 :
Make a scatter plot of Lily’s running data.
Step 2 :
To draw a trend line, use a straight edge to draw a line that has about the same number of points above and below it. Ignore any outliers.
Step 3 :
Find the slope of the trend line.
The line passes through points (2, 20) and (4.5, 45).
Use the slope formula.
m = (y2 - y1) / (x2 - x1)
Substitute x1, = 2, y1 = 20, x2 = 4, and y2 = 45.
m = (45 - 20) / (4.5 - 2)
m = 25 / 2.5
m = 10
Step 4 :
Find the y-intercept of the trend line.
Slope-intercept form equation of a line :
y = mx + b
Plug y = 20, m = 10 and x = 2.
20 = 10 · 2 + b
20 = 20 + b
Subtract 20 from both sides.
0 = b
Step 5 :
Use your slope and y-intercept values to write the equation.
Slope-intercept form equation of a line :
y = 10x + 0
So, the equation for the trend line is
y = 10x
Example 2 :
David records the number of chapters and the total number of pages for several books as given below.
No. of chapters
3
4
5
8
10
11
15
17
19
No. of pages
20
44
50
95
90
130
125
170
160
Step-by-step explanation:
3(4x+5) = 12x+15 what does it equal?
Answers
Answer: AllRealNumbers
Step-by-step explanation:
1. Distrubute: 3(4x+5)=> 12x+15
2. Simplify: 12x+15=12x+15
=> 15=15
Since it cancels out it means that x can be any real number.
Have a nice day! :D
Simplify:
√3 (√3+x)
A. (3+x)√3
B. 2x√3
C. 3+x√3
(I'll mark brainliest if you explain and show your work)
Answers
Answer:
C
Step-by-step explanation:
[tex]\sqrt{3}[/tex] times [tex]\sqrt{3}[/tex] = 3 and [tex]\sqrt{3}[/tex] times x = [tex]\sqrt{3}[/tex]x
So that means that answer is 3+[tex]\sqrt{3}[/tex]x which is C
Pls helpppp I need the answer asap
Answers
Answer:
CASH = 7284
Step-by-step explanation:
MATHEMATICS = 12345123678
CASH = ?
Find what number the letters represent:
M = 1
A = 2
T = 3
H = 4
E = 5
I = 6
C = 7
S = 8
Then, replace the numbers in the word CASH:
C = 7
A = 2
S = 8
H = 4
Therefore, the number is 7284.
Hope this helps and please mark Brainliest :)
Lillie begins solving the equation 4 (x - 1) - x = 3 (x + 5) -11. Her work is shown below.
Answers
Answer:
I dont know
Step-by-step explanation:
sorry but I need these points
Answer:
The equation has no solution
Step-by-step explanation:
I got it right on edge 2021
What kind of sequence is this? –41, –51, –61, –71
Answers
Answer:
Arithmetic
Step-by-step explanation:
1. Evaluate each algebraic expression.
c. 3b - 5
for b = -2
for b = 3
for b = 9
I need the answer
Answers
Answer:
-11, 4, and 22
Step-by-step explanation:
Expression: 3b-5
when b=-2
Expression: 3(-2)-5=-11
When b=3
Expre; 3(3)-5=4
When b=9
Expre; 3(9)-5=22
WELL, I NEED HELP AGAIN 3.0
Answers
Answer:
up by 4 left by 2
Step-by-step explanation:
Question 1 (25 points)
An isosceles triangle has a base 8.8 units long. If the congruent side lengths have measures to the first decimal place, what is
the shortest possible length of the sides?
4.5
8.9
4.3
Od
17.7
b
С
Answers
Answer:
4.5
Step-by-step explanation:
For any triangle, the basic principle for these types of problems is that the sum of the 2 shorter sides has to be greater than the longest side, otherwise it is not a triangle, even if it's equal to the longest side.
So, let's look at the first option. 4.5. Since this is an isosceles triangle and the base is 8.8 units, the other side has to be 4.5 as well. 4.5+4.5=9. 9 > 8.8. So, we can immediately eliminate options 8.9 and 17.7. What about 4.3? Well, 4.3+4.3= 8.6, but 8.6 < 8.8, so 8.6 is wrong. So, the answer is 4.5.
Find the slope and y-intercept of the line in each graph.
Answers
On the right
Slope is negative 2/3 and the intercept is 2
Answer:
1. slope = 2; y-intercept = 3
2. slope = [tex]\frac{-2}{3}[/tex]; y-intercept = 2
let me know if you need the math
Im struggling in math rn and i need help with this problem 3 1/4 = 1/2 + w
Answers
Answer:
w= 2 3/4
Step-by-step explanation:
First, we need to find what can equal w. So, we can subtract 1/2 form both sides, so one sides has just w and one side has just a number. 3 1/4-1/2= 2 3/4. So w= 2 3/4
Answer:
2 3/4
Step-by-step explanation:
3 1/4 = 1/2 + w
Transfer 1/2 to other side
3 1/4 - 1/2 = w
Solve
w = 2 3/4
Hope this helps!! Please give Brainliest!!
Erin rolled a number cube with sides labeled 1 through 6. She rolled the number cube 400 times and recorded each result. About how many times could Erin expect to roll a 4?
Answers
Answer:
about 67 times
Step-by-step explanation:
hope this helps :)
Last week, Naomi set a new personal record for running the mile. She beat her previous record by 14 seconds. The time change from her previous record can be represented by ________.
A. Zero
B. A negative rational number
C. A positive rational number
Answers
Answer:
negitive :)
Step-by-step explanation:
Kimberly's family has a dinner bill of $56.95 and wants to leave a 15% tip for their server. How much will this family spend for the meal plus the tip? 50 points!
Answers
Answer:
This family spend for the meal plus the tip : $56.95 + $8.54 = $65.49
The tip = $56.95 x 15% =$8.54
Step-by-step explanation:
Easy.
Find the area of the figure.
Answers
Answer:
i DONT KNOW
Step-by-step explanation:
the sales tax for an item was 12.80 and it cost 320 before tax
Answers
Answer:
4%
Step-by-step explanation:
Divide the tax by the pre-tax price =
12.80/320 = .04 or 4%
Price: $8.62 per 3 lb of strawberry
How much will it cost to buy 4.2 lb of strawberries? (Round to 2 decimal digits if necessary)
Answers
9514 1404 393
Answer:
$12.07
Step-by-step explanation:
The cost is proportional to the weight, so we have ...
dollars/pounds = c/4.2 = 8.62/3
Multiplying by 4.2 gives ...
c = 4.2×8.62/3 = 12.068
The cost of 4.2 pounds of strawberries is $12.07.
PLEASE ANSWER FAST this is homework and my teacher is giving us time to do it even if the deadline passed I don't know fractions
Answers
Answer:
Step-by-step explanation:
5/7
Graph this function using intercepts:
4x - 5y = 40
Answers
use photomath for that that's way easier
Please help, and plz don't be saying this is the right answer if u dont know for sure.
Answers
The answer you’ll put in the box is 1, because it doesn’t ask you to solve for x, just fill in the number.
Answer:
The blank in the equation is 1.
x = 7 and the vertical angles measure out to 64 degrees.
Step-by-step explanation:
When solving for x, you always want to keep the variables on one side. So you'll subtract 9x from both sides. That gives you 1=3x-20. Then you'll add 20 to both sides. This gives you 21=3x. After you'll divide by 3 on both sides. This gives you 7=x.
Now you'll plug in 7 for x. This gives you 12*7-20=9*7+1. First, you'll multiply which gives you 84-20=63+1. Add and you'll get 64 on both sides.
What is the value of 6x90.6
Answers
Answer:
543.6
Step-by-step explanation:
answer is 543.6 :)
Ben sells homemade cards at a craft fair. He wants to earn more than $50 at the fair. He sells his cards for $2 and he has already earned $36. How many cards foes he need to sell to reach his goal? Write and solve an inequality.
Answers
Answer:
He must sell 8 cards to reach the minimum goal.
Step-by-step explanation:
Giving the following information:
He wants to earn more than $50 at the fair.
He sells his cards for $2 and he has already earned $36.
First, we need to calculate the money required to reach the minimum goal:
51 - 36= $15
Now, we write the inequality:
2*x >15
x= number of cards sold.
x>15/2
x> 7.5
He must sell 8 cards to reach the minimum goal.