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Probability Questions

Authored by Anthony Clark

Mathematics

7th Grade

Probability Questions
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11 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the missing value for P(X=5) in the probability ditribution:


Number of Toys | Probability

0| 0.03

1| 0.16

2| 0.30

3| 0.23

4| 0.17

5| ?

0.11

0.21

0.01

0.31

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Determine which of the following distribution is NOT a probability distribution.

A

B

C

D

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What does P(Y<3) mean?

The probability that the random variable Y is greater than 3.

The probability that the random variable Y is less than 3.

The probability that the random variable X is greater than 3.

The probability that the random variable X is less than 3.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Consider the following distribution where X = number of mice caught in an apartment in a night:

Mice | Probability

0 | 0.12

1 | 0.20

2 | 0.31

3 | 0.14

4 | 0.16

5 | 0.07

Which of the following means "trapping at least one mouse?"

X<1

X<1

X>1

X>1

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Consider the following distribution where X = number of mice caught in an apartment in a night: Which of the following means "trapping less than 2 mice?"

X<2

X<3

X>2

X>2

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Consider the following distribution where X = number of mice caught in an apartment in a night:

Mice | Probability

0 | 0.12

1 | 0.20

2 | 0.31

3 | 0.14

4 | 0.16

5 | 0.07

What is the probability of trapping at least three mice?

0.14

0.37

0.23

0.16

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A marketing survey compiled data on the number of cars in households.  If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution:  X P(X) 0 0.24 1 0.27 2 0.20 3 0.11 4 0.05 5 0.03 What is the probability that a randomly chosen household has at least two cars?

0.20

0.29

0.39

0.61

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