Question

How do you find the number of distinguishable permutations of the group of letters: B, B, B, T, T, T, T, T?

Answer 1

`56`

Explanation:

`3B + 5T`

The number you're looking for is:

`x = frac{8!}{3! * 5!} = frac{8 * 7 * 6}{3 * 2}`