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Three fair dice are rolled.  Find the probability that the sum of the rolls is 5.

 May 19, 2020
 #1
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The probability is 3/37.

 May 19, 2020
 #2
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There are only 6 combinations that sum up to 5 as follows:

 

113 , 122 , 131 , 212 , 221 , 311 , Total =  6

 

 

Therefore, the probability is: 6 / 6^3 = 1 / 36

 May 19, 2020

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