SOLUTION: Find the probability, if we roll a pair of fair dice four times, that we get a sum of five on all four rolls. Write your answer as a decimal, rounded to three significant figur

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Question 1185516: Find the probability, if we roll a pair of fair dice four times, that we get a sum of five on all four rolls.
Write your answer as a decimal, rounded to three significant figures.

Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
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Find the probability, if we roll a pair of fair dice four times, that we get a sum of five on all four rolls.
Write your answer as a decimal, rounded to three significant figures.
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First, consider rolling one pair of fair dice.


There are 36 possible outcomes, in all;

of them, the favorable outcomes with the sum of 4 are  these four outcomes (1,4), (2,3), (3,2) and (4,1).


So, the probability to get the sum of 5, rolling a pair of dice is  4%2F36 = 1%2F9.


Now, if we roll a pair of fair dice four times, the probability to get a sum of five on all four rolls is


    P = %281%2F9%29%5E4 = 1%2F9%5E4 = 0.000152  (rounded as requested).      ANSWER

Solved.