A math department is allowed to tenure 4 of 19 eligible teachers. In how many ways can the selection for tenure be made?
n!/(n-r)!r! = 4!/-15!19!
You are choosing 4 from 19
= C(19,4)
= 19!/(15!4!)
= 3876
n!/(n-r)!r! = 4!/-15!19!
= C(19,4)
= 19!/(15!4!)
= 3876