1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Norma-Jean [14]
2 years ago
8

A television game show has 12 ​doors, of which the contestant must pick 3. Behind 3 of the doors are expensive​ cars, and behind

the other 9 doors are consolation prizes. The contestant gets to keep the items behind the 3 doors she selects. Determine the probability that the contestant wins at least one car.
Mathematics
1 answer:
almond37 [142]2 years ago
8 0

The probability that the contestant wins at least one car is 3/5.

<h3>What is the probability?</h3>

Probability refers to a possibility that deals with the occurrence of random events.

The probability of all the events occurring need to be 1.

For 1 car, we consider two possible outcomes:

P(1 car) = 2/6 x 4/5 + 4/6 x 2/5

P(1 car) = 8/15

For no car in either door

P(no car) = 4/6 x 3/5

P(no car) = 2/5

The probability that the contestant wins at least one car is the sum of the probability of one car and the probability of two cars:

P(2 cars) = 2/6 x 1/5

= 1/15

P(1 car) + P(2 cars) = 8/15 + 1/15

= 3/5

Learn more about probability here;

brainly.com/question/11234923

#SPJ1

You might be interested in
Of 30 students 1/3 play sports 2/5 of them play soccer how many play soccer
vfiekz [6]
30 ÷ 3 = 10 = 1/3. So 10 students play sports. 10 ÷ 5 = 2 = 1/5, so 2 × 2 = 4 = 2/5. Your answer is 4 students. I hope this helps!
4 0
2 years ago
Read 2 more answers
Help please!! -1/y^-4
Step2247 [10]

Answer:Move

y

−

4

to the numerator using the negative exponent rule

1

b

−

n

=

b

n

.

−

y

4

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
A school wishes to enclose its rectangular playground using 480 meters of fencing.
Harlamova29_29 [7]

Answer:

Part a) A(x)=(-x^2+240x)\ m^2

Part b) The side length x that give the maximum area is 120 meters

Part c) The maximum area is 14,400 square meters

Step-by-step explanation:

The picture of the question in the attached figure

Part a) Find a function that gives the area A(x) of the playground (in square meters) in terms of x

we know that

The perimeter of the rectangular playground is given by

P=2(L+W)

we have

P=480\ m\\L=x\ m

substitute

480=2(x+W)

solve for W

240=x+W\\W=(240-x)\ m

<u><em>Find the area of the rectangular playground</em></u>

The area is given by

A=LW

we have

L=x\ m\\W=(240-x)\ m

substitute

A=x(240-x)\\A=-x^2+240x

Convert to function notation

A(x)=(-x^2+240x)\ m^2

Part b) What side length x gives the maximum area that the playground can have?

we have

A(x)=-x^2+240x

This function represent a vertical parabola open downward (the leading coefficient is negative)

The vertex represent a maximum

The x-coordinate of the vertex represent the length that give the maximum area that the playground can have

Convert the quadratic equation into vertex form

A(x)=-x^2+240x

Factor -1

A(x)=-(x^2-240x)

Complete the square

A(x)=-(x^2-240x+120^2)+120^2

A(x)=-(x^2-240x+14,400)+14,400

A(x)=-(x-120)^2+14,400

The vertex is the point (120,14,400)

therefore

The side length x that give the maximum area is 120 meters

Part c) What is the maximum area that the playground can have?

we know that

The y-coordinate of the vertex represent the maximum area

The vertex is the point (120,14,400) -----> see part b)

therefore

The maximum area is 14,400 square meters

Verify

x=120\ m

W=(240-120)=120\ m

The playground is a square

A=120^2=14,400\ m^2

8 0
3 years ago
Most skilled individuals texting are less likely to have an accident compared to the ones that have to look at their phones?
vivado [14]
No
 the answer is no because although you feel you have control as an experienced driver, a mere second can kill you
3 0
3 years ago
Read 2 more answers
Which expression does the number line represent?
seropon [69]

Answer:

I think the answer is 3÷3/4

Step-by-step explanation:

im not sure, when i worked it out in my head that's the answer that made the most sense

5 0
2 years ago
Other questions:
  • The translation of a figure is called the pre-image
    14·1 answer
  • During an experiment, readings for blood pressure in a person's body were found to be constant. However, when measured by a diff
    11·1 answer
  • At what temperature did the gas have a volume of 110 mL?<br> 300 K<br> 110 K<br> 20 K<br> 19 K
    6·1 answer
  • Verbal expression to algebraic expression ​
    9·1 answer
  • Simplify the expression below.<br> √169
    8·2 answers
  • Help plz will give brainliest​
    5·1 answer
  • What is 555.55 rounded to the nearest tenth?
    9·1 answer
  • 6. Hank can type 24 words per minute. Hank starts
    12·1 answer
  • For which distributions is the median the best measure of center?
    10·1 answer
  • Circumfrence of circle with radius of 32in
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!