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Wu rolls two fair, six-sided dice. You are not told what the rolls were, but you are told that the sum of the two rolls is a prime. What is the probability that the sum of the two rolls is ?

 Mar 28, 2020
 #1
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Some parts of the question are missing. If you fix the question, I would love to help :D

 Mar 28, 2020
 #2
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There are 15 ways you can make up the primes of: 2, 3, 5, 7, 11 on rolling 2 dice as follows:

 

11 , 12 , 14 , 16 , 21 , 23 , 25 , 32 , 34 , 41 , 43 , 52 , 56 , 61 , 65 , Total =  15

 

 

The prabability is: 15 / 6^2 =5 / 12

 Mar 28, 2020

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