Question

Joseph has 9 business shirts. He needs to take 4 shirts for a work conference. In how many ways can he choose 4 shirts out of 9?

Answer 1

Answer: 3,024

Explanation:

This is a probability question. Here, the order does not matter, so a combination of shirts 1, 2, 3, and 4 and 4, 3, 2, and 1 count together as 1. We use the permutation calculator to get 9! / ( 9 - 4 )!. ( 9 - 4 )! is equal to 5! and 9! / 5! = 9x8x7x6, or 3,024