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Probability Practice

Total questions: 15

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

A letter from the word SQUARE is chosen, then a coin is tossed. What is P(Q)?

a)

16.67%

b)

33.33%

c)

50%

d)

8.33%

2.

A letter from the word SQUARE is chosen, then a coin is tossed. What is P(Heads)?

a)

50%

b)

100%

c)

25%

d)

75%

3.

A letter from the word SQUARE is chosen, then a coin is tossed. What is P(vowel, then tails)?

a)

25%

b)

100%

c)

50%

d)

75%

4.

A smoothie comes in three sizes- small, medium, and large, and five flavors- strawberry, banana, orange, blueberry, and watermelon. How many total smoothie possibilities are there?

a)

15

b)

5

c)

3

5.

A smoothie comes in three sizes: small, medium, and large, and five flavors: strawberry, banana, orange, blueberry, and watermelon. What is P(medium)?

a)

33.33%

b)

20%

c)

100%

d)

6.67%

6.

A smoothie comes in three sizes: small, medium, and large, and five flavors: strawberry, banana, orange, blueberry, and watermelon. What is P(banana)?

a)

20%

b)

2%

c)

6.67%

d)

33.33%

7.

A smoothie comes in three sizes: small, medium, and large, and five flavors: strawberry, banana, orange, blueberry, and watermelon. What is P(large or blueberry)?

a)

46.67%

b)

53.33%

c)

20%

d)

33.33%

8.

Runners in a marathon are randomly assigned to one of the ten corrals to start, and each given a green, blue, or red shirt to wear. How many total outcomes are there?

a)

30

b)

20

c)

10

d)

3

9.

How many ways can Mark create a 4-digit code for his garage door opener, using the digits 0-9?

a)

10,000

b)

40

c)

6561

d)

36

10.

This spinner is spun twice. Find P(z both times)

a)

4%

b)

40%

c)

8%

d)

20%

11.

A coin is tossed three times. Find the probability of getting all heads or all tails.

a)

25%

b)

50%

c)

33.33%

d)

3.7%

12.

A card is chosen from a standard deck, then a month of the year is chosen. Find the probability of getting a face card and June.

a)

1.92%

b)

5.77%

c)

4.80%

d)

23.08%

13.

A letter of the alphabet is chosen, then a digit from 1-9 is chosen. Find P(x, then a prime number)

a)

1.7%

b)

2.14%

c)

1.28%

14.

One of the 50 states is chosen at random, then a die is rolled. Find P(State starts with the letter A, then a number less than 3)

a)

2.67%

b)

4%

c)

26%

d)

10.67%

15.

A multiple choice test contains questions with 4 options: A, B, C, or D. If Natalie randomly guesses on the last three questions, what is the probability that she gets all three correct?

a)

1.56%

b)

75%

c)

12%

d)

39%