Question 315511: A pair of fair dice is rolled. What is the probability of rolling a sum that is even or prime?
Answer by CharlesG2(834)   (Show Source):
You can put this solution on YOUR website! A pair of fair dice is rolled. What is the probability of rolling a sum that is even or prime?
smallest number that can be rolled is 2
largest number that can be rolled is 12
all numbers have an equal chance of being rolled
total of 11 possible numbers that can be rolled
2,3,5,7,11 are prime, that is 5 numbers
2,4,6,8,10,12 are even, that is 6 numbers, the number 2 is in this list as well
9 is the only number that is not in either list
the probability is 10/11 or 90.91%
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