SOLUTION: A pair of fair dice are rolled. What is the probability that both dice either turn up the same number or that the sum of the numbers is less than 5?

Question 851277: A pair of fair dice are rolled. What is the probability that both dice either turn up the same number or that the sum of the numbers is less than 5?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

P(same 0r sum < 5) = 6/36 + 6/36 - 2/36 = 10/36 = 5/18

___1_2_3__4__5__6

1|_2_3_4__5__6__7

2|_3_4_5__6__7__8

3|_4_5_6__7__8__9

4|_5_6_7__8__9_10

5|_6_7_8__9_10_11

6|_7_8_9_10_11_12

 

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