Question

How many ways are there to choose a committee of 3 people from a group of 9 people?

Answer 1

this is a combination problem, the order doesn't matter here because everyone's part of the same group

number of combinations = nCr, where n is the total number of items, and r is the number of items we are picking at once

nCr = n!/(r!*(n-r)!))

n = 9, because there are 9 total people
r = 3 because we are picking a committee of 3 people at a time