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## Homework Statement

What is the probability of rolling exactly two ones from a set of six dice?

## Homework Equations

Binomial probability distribution?

## The Attempt at a Solution

I tried:

P = 6!/(2! x 4!) x (1/6)^2 x (5/6)^4 and got 0.20, but the book says that's a factor of 10 too high!