evaluate the combination:

Question

there is a set of parentheses, 15 on top of a 15- it would look like this, just one set of parentheses

(15)
(15)

i am just stuck

Answer 1

This is the notation used for combinations. In particular, its top-choose-bottom. In your example, you have 15 items (top) and you want to determine the number of ways of picking 15 of them (bottom).

BTW, the answer in this example is 1.