Problema Solution
An election ballot asks voters to select five city commissioners from a group of eighteen candidates. In home many ways can this be done
Answer provided by our tutors
C(18, 5) = 18!/((18 - 5)! 5!)
C(18, 5) = 18!/(13! 5!)
C(18, 5) = 14*15*16*17*18/(2*3*4*5)
C(18, 5) = 8,568 ways