Quiz about Probability And Combinatorics

Question 1

A hospital tracked the day of the week each baby was born and whether or not the delivery was scheduled in advance. The following two-way table displays data for the sample of babies born in a particular year at that hospital.

![](http://admin.getprephub.com/media/editor/p1_20220916203403287587.png)

Find the probability that a randomly selected baby from this sample $${P}(	ext{ Tuesday OR Friday }$$) was born on Tuesday OR on Friday.

Accepted Answer

Covalent bond

Answer

$$\frac{8}{25}$$

Answer

$$\frac{16}{25}$$

Answer

$$\frac{63}{2500}$$

Answer

$$\frac{\frac{8}{25}}{5}$$

Question 2

When registering their cars, owners must identify the color that covers the largest portion of the vehicle. In one region, the probability that car was mainly white was $$0.24$$, the probability that it was mainly silver was $$0.22$$, point and the probability that it was mainly black was $$0.19$$. Find $$P$$ (silver OR black)

Accepted Answer

Covalent bond

Answer

$$0.41$$

Answer

$$0.23$$

Answer

$$0.379$$

Answer

$$0.73$$

Question 3

A restaurant noted what type of food its customers purchased last week. Here are the results:

![](http://admin.getprephub.com/media/editor/p3_20220916203602564466.png)
Find the probability $$P$$ (burger OR fries) that a randomly selected person from this sample bought a burger or bought fries.

Accepted Answer

Covalent bond

Answer

$$0.8$$

Answer

$$0.4$$

Answer

$$0.425$$

Answer

$$0.5$$

Question 4

Fifty people were surveyed about their preference between chocolate and vanilla cake. The following two-way table displays data for the sample of people who responded to the survey.

Find the probability that a randomly selected person from this sample is female OR prefers chocolate.

![](http://admin.getprephub.com/media/editor/p4_20220916203723881178.png)

Accepted Answer

Covalent bond

Answer

$$0.8$$

Answer

$$0.2$$

Answer

$$0.5$$

Answer

$$0.9$$

Question 5

Ana is a teacher who plays a review game with her class. The game involves writing each student's name on an identical slip of paper and selecting students at random. Here's the makeup of her class:

![](http://admin.getprephub.com/media/editor/p5_20220916203942077331.png)

Suppose that Ana picks a name, replaces it, and picks a name again.

What is the probability that NEITHER of the students selected are $$9^{	ext {th }}$$ ?[ round your answer to two decimal places]

Accepted Answer

Covalent bond

Answer

$$0.33$$

Answer

$$0.57$$

Answer

$$0.43$$

Answer

$$0.75$$

Probability And Combinatorics Precalculus Maths Problems and Solutions

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