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186-P1-1

A Pair of Dice

A pair of dice A and B is rolled at the same time. Find the probability that the
sum of the rolled numbers is either 4 or 11.

AB

Step 1. Find all the possible outcomes when a pair of dice A and B is rolled.

Step 2. Find the possible outcomes and complete the table.

A 1 2 3 4 5 6
B

12 3

23

3

4

5

6

Step 3. Find the probability that the sum of the rolled numbers is 4 when a pair of
dice A and B is rolled at the same time.

Step 4. Find the probability that the sum of the rolled numbers is either 4 or 11
when a pair of dice A and B is rolled at the same time.
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