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) (Show Source):
You can put this solution on YOUR website! .
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.
~~~~~~~~~~~~~~~~~
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 = .
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 = = = 0.000152 (rounded as requested). ANSWER
Solved.
|
|
|