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
SOMEONE PLEASE HELP ME BEFORE I FAIL
Answers
Answer:
4/40
Step-by-step explanation:
you can reduce this to 1/10
multiplying 4 by both 1 and 10 will give you the fraction 4/40 both can be divided by 4 and that's how it can reduce to the 1st fraction (1/10)
Fill in the blank so that the ratios are equivalent. 3:9 and 6:
Answers
Answer: 18
Step-by-step explanation: The ratio 3:9 is equivalent to 1:3. This means that whatever number on the left side of the ratio should be multiplied by 3 to get the one on the right. 6 x 3 = 18.
The value of the unknown number for the fraction is equal to 18.
What are ratios and proportions?An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value. The numerical relationship between two values demonstrates how frequently one value contains or is contained within another.
Given that the ratio is 3:9 then the value of the unknown number will be calculated as,
The ratio 3:9 is equivalent to 1:3. This means that whatever number is on the left side of the ratio should be multiplied by 3 to get the one on the right.
The unknown number will be,
6 x 3 = 18.
Therefore, the value of the unknown number for the fraction is equal to 18.
To know more about ratios and proportions follow
https://brainly.com/question/2914376
#SPJ2
Please help me I will give brainliest
Answers
Answer:
60 milligrams
Step-by-step explanation:
just cross multiply! percentages are just fractions of 100. so you can say that [tex]\frac{45}{x} =\frac{75}{100}[/tex]
multiple 75 by x and 45 by 100 and you get
4500=75x
divide both sides by 75 and you get 60
Will mark brainliest
Answers
Answer:
b then a
Step-by-step explanation:
what is the property pls help
Answers
Answer:
B
Step-by-step explanation:
Because its addition
Answer:
I'm pretty sure it's B). Additive identity Property.
Step-by-step explanation:
If it isn't let me know.
A store bought 250 toys at a cost of $24 each. The store sold all the toys at a percent markup of 60 percent. Find the total selling price
Answers
Why thank you for helping me and I will mark brainliest if you’re right :)
Answers
Answer:
Choice #1) 4.7 cm
Step-by-step explanation:
circumference of full circle = 2(r)(3.14)
a full circle would be = 2(3)(3.14) = 18.84 cm
It is 1/4 circle so 18.84/4=4.7 cm
Answer:
10.7
Step-by-step explanation:
1. I first grabbed a ruler to measure the other straight side of the figure.
2. Both of the straight sides were 3 cm so I knew that the answer had to be greater than 6 cm.
3. I then estimated that the other side was longer than the 3 cm.
4. I then had to my logic to figure out the answer and I very quickly realized that 4.7 cm would not make since because that is less than 6 cm. I know 7.7 cm would not make since because I knew the curved side was longer than 3 cm not shorter. 18.8 cm did not make since because that answer has WAY to much cm. Using the process of elimination, 10.7 cm was the only answer that made since.
Need help on this please help
Answers
Answer:
6028.8
Step-by-step explanation:
Answer:
v = 6028.8m³
Step-by-step explanation:
Cylinder volume formula:
πr²h
3.14*8²*30=6028.8m³
Bob bought a thing for $350 and sold it for $450. What was his percentage gain?
Plz need answers ASAP!!
Answers
Answer:
The answer 128.57%
Step-by-step explanation:
The explanation is
Answer:
28.57%
Step-by-step explanation:
What’s the value of a?
Answers
Answer:
a = 69
Step-by-step explanation:
The linear pair equals 180 degrees.
a + 90 + 21 = 180
a + 111 = 180
a = 69
nice!
Answer:
A= 69 degrees
Step-by-step explanation:
if all those angles equal a total of 180 degrees then all you need to do is add the angles your given which in this case is 21 and a 90 degree angle which would equal 111 degrees, then subtract 111 from 180 and that would be the answer to the missing angle, which is 69 degrees.
21 + 90 = 111
180- 111 = 69
Solve for x
A. 10
B. -8
C. 6
D. 3
Answers
Answer:
c (6)
Step-by-step explanation:
by the corresponding angles postulate, the angle above 20x-5 will be 65°.
20x - 5 + 65 = 180 they are supplementary angles (angles that add up to 180°)
20x + 60 = 180
20x = 120
x = 6
what u think answer
Answers
Sara Poured 3/4 of the juice from a 2-liter bottle while serving guests at a party. How much juice, in liters, is still left in the bottle?
Answers
Answer:
1 1/4 of a liter
Step-by-step explanation:
which expression is equivalent to -4(3d-2)-7
Answers
Multiply -4 by what’s in the bracket:
-4(3d-2)
= -12d + 8
Then minus 7 from 8
-12d + 8 - 7
= -12d + 1
Answer: -12d + 1
I am a number between 12 and 18.
I am a multiple of 2.
I am not a multiple of 4.
Answers
Find the distance between 2 and -2
A) -6
B) -4
C) 0
D) 4
Answers
Answer:
d
Step-by-step explanation:
Can someone help me with #3 on c d and e
Answers
Step-by-step explanation:
1.2 x 5 = 6.0
0.9 x 1.1 = .99
1.5 x 2 = 3.0
a) What fraction is equal to 50% of 1/3?
b) What fraction is equal to 75% of 1/2?
you dont need to show working out
Answers
50% x 1/3
50/100 x 1/3
1/2x1/3
1/6
b) 75% of 1/2
75/100 x 1/2
15/20 x 1/2
3/4 x1/2
3/6
1/2
Simplify the expression
4 + 3(x + 2)
Answers
Answer: 3x+10
You welcome!
Explain the power of products property and give an example
Answers
Answer:
We use the power of a product rule when there are more than one variables being multiplied together and raised to a power. The power of a product rule tells us that we can simplify a power of a power by multiplying the exponents and keeping the same base.
3 raised to the power of 4 is = 81
Will give brainliest if correct!
Determine the slope of the following
Answers
Answer:
m = 2
Step-by-step explanation:
Plug 2 coordinates into the slope formula
(y2-y1)/(x2-x1)
For this I will choose the first and third coordinates:
15-7/5-1 = 2
The slope is 2
Please please help pleaseeeeee
also .. it wouldnt let me crop the photo ..
Answers
I NEED HELP PLEASE!!!
Answers
Answer:
hardhard
Step-by-step explanation:
Please help ASAP! :))
Answers
Answer:
yellow
Step-by-step explanation:
Arnie is mixing red and yellow paints to make two different shades of orange. To make 1 cup of dark orange paint, he needs 7 ounces of red paint and 1 ounce of yellow paint. To make 2 cups of light orange paint, he needs 13 ounces of yellow paint and 3 ounces of red paint. Answer parts a and b.
Answers
Answer:
Arnie has enough red paint
Step-by-step explanation:
step 1
Find out the number of ounces of red paint needed to make 3 cups of dark orange paint
Let
x -----> number of ounces of red paint
y -----> number of ounces of yellow paint
z ----> cups of dark orange
we know that
\frac{x}{z}=\frac{7}{1}\ \frac{ounces\ red\ paint}{cups\ dark\ orange}
z
x
=
1
7
cups dark orange
ounces red paint
so
For z=3 cups
substitute and solve for x
\frac{x}{3}=\frac{7}{1}
3
x
=
1
7
x=21\ ounces\ of\ red\ paintx=21 ounces of red paint
step 2
Find out the number of ounces of red paint needed to make 3 cups of light orange paint
Let
x -----> number of ounces of red paint
y -----> number of ounces of yellow paint
z ----> cups of light orange
we know that
\frac{x}{z}=\frac{3}{2}\ \frac{ounces\ red\ paint}{cups\ light\ orange}
z
x
=
2
3
cups light orange
ounces red paint
so
For z=3 cups
substitute and solve for x
\frac{x}{3}=\frac{3}{2}
3
x
=
2
3
x=4.5\ ounces\ of\ red\ paintx=4.5 ounces of red paint
step 3
Adds the ounces of red paint
21+4.5=25.5\ ounces\ of\ red\ paint21+4.5=25.5 ounces of red paint
25.5\ ounces < 32\ ounces25.5 ounces<32 ounces
therefore
Arnie has enough red paint
Solve the system of equations
Y = 2x
X - Y = 10
Answers
Answer:
x=-10, y=-20
Step-by-step explanation:
first you substiture the y in the second equation with the first
x-2x=10
then solve
1x-2x=-1
-x=10
multiply both sides by a negative to make the varible a
positive
x=-10
now we substitue the x in the first equation with -10
y=2(-10)
y=-20
Alfred has a lawn service. He earns $40 for every 3 lawns he mows. Which of the following
represents the rate of change his income with respect to the number of lawns he mows?
$50
4 lawns
$53.33
4 laws
4 laws
$50
4 laws
$53.33
Answers
Answer: I don’t think I’m right but 53.33
Step-by-step explanation:
A $95 graphing calculator is on sale for $85.50.
The percent decrease is _____.
9%
1%
10%
9.5%
Answers
Answer:
10%
Step-by-step explanation:
moo
Given that a = 7.4 cm and b = 2.5
cm, work out the perimeter of the
triangle.
Give your answer rounded to 1 DP.
Answers
Answer:
3
Step-by-step explanation:
its 8 because if you round it by 1 then you get 3
help ur guy out im not able to understand this
Answers
Answer:
a = 4.5
b = 5
Step-by-step explanation:
Answer:
b=7
area=20
a=5.66
perimeter=19.66
Step-by-step explanation:
Don't know your exact question but here goes everything:
since angle between a and b=45 degrees, b=4+3
b=7
area=(7x4)-1/2(4)(4)
area=28-8
area=20
a^2=4^2+4^2
a^2=16+16
a^2=32
a=5.66
