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What is the probability of rolling a sum of 8 on at least one of two rolls of a pair of number cubes?
Wiki User
∙ 11y ago
The probability of rolling a sum of 8 on one roll of a pair of dice is 5/36.
The probability of not rolling a sum of 8 on one roll of a pair of dice is 31/36.
The probability of rolling a sum of 8 twice on two rolls of a pair of dice is
(5/36)(5/36) = (5/36)2 .
The probability of rolling first a sum of 8 and then rolling a sum that is not 8 on the
second roll is (5/36)(31/36).
The probability of rolling a sum that is not 8 on the first roll and rolling a sum of 8
in the second roll is (31/36)(5/36).
So The probability of rolling a sum of 8 at least one of two rolls of a pair of dice is
(5/36)2 + (5/36)(31/38) + (31/36)(5/36) = 0.258487654... ≈ 25.8%.
Wiki User
∙ 11y ago
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one fourth
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What is the probability of rolling a 1 with six dice?
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A fair die is rolled 180 times what is the probability of rolling a six?
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