Probability

1. Roll 2 dice. How many possible outcomes are there?
A) 25
B) 30
C) 36
D) 6

2. Roll 2 dice. What is the probablility that the dice add up to 12?
A) 2/36
B) 1/36
C) 12/25
D) 1/6

3. Roll 2 dice. What is the probability that you get doubles (both dice are the same)?
A) 3/25
B) 1/5
C) 1/6
D) 1/36

4. Roll 2 dice and add them up. What sum is most likely
A) 11
B) 12
C) 2
D) 7

5. Roll 2 dice and add them up. What is the probability that the sum is 2 or 3?
A) 1/10
B) 1/6
C) 2/25
D) 1/12

6. Flip 3 coins. How many possible outcomes are there?
A) 4
B) 8
C) 6
D) 12

7. Flip 3 coins. What is the probability of getting 3 heads?
A) 1/8
B) 1/4
C) 3/8
D) 1/2

8. Flip 3 coins. What is the probability of getting 2 heads and 1 tail?
A) 1/2
B) 1/4
C) 1/8
D) 3/8

9. Flip 3 coins. What is the probability of getting 1 or 2 heads?
A) 1/8
B) 3/4
C) 1/4
D) 1/2

10. Flip 3 coins. What is the probability of getting 3 tails?
A) 3/8
B) 1/4
C) 1/8
D) 1/2

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Answer Key

1.C  2.B  3.C  4.D  5.D  6.B  7.A  8.D  9.B  10.C  

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