Question

What is the probability of rolling a sum of 8 on at least one of two rolls of a pair of number cubes?

possible answers:
5/8
335/1296
25/1296
4/81

not sure how to solve this!?

Answer 1

P(At least one sum of 8) = 1 - P(No sums of 8)

P(At least one sum of 8) = 1 - (1 - 5/36)^2

P(At least one sum of 8) = 1 - (31/36)^2

P(At least one sum of 8) = 1 - 961/1296

P(At least one sum of 8) = 335/1296


So the answer is choice B

Answer 2

Thank youuuuu!!!

Answer 3

you're welcome

Answer 4

I love you