Question

An election ballot asks voters to select six city commissioners from a group of fifteen candidates. In how many ways can this be done?

Answer 1

Answer: HI HERE IS UR ANSWER

The answer is  

N = 15C4 = 1365 ways

Step-by-step explanation          

15 choose 4 is calculated via the following: 15!/(4!*11!) where 15! = 15*14*13*...*3*2*1  

The general formula for n choose a is n!/(a!*(n-a)!)