Question on probability

Question

Que. How many 5-man squads could be chosen from a company of 20 men?

Answer 1

The 5-man squad has no order or sequence. You can just randomly pick 5 from 20 men. Therefore this is combination and the formula is:

_nC_r = n!/(r!(n-r)!)

Combination of n taken r at a time.

₂₀C₅ = 20! / (5!*15!)

= 15504