Problema Solution
how many ways can i pack 4 shirts if i own 9?
Answer provided by our tutors
we need to find C(n, k) the number of k-combinations of n elements where k = 4 and n = 9
C(n , k) = n!/(k!(n - k)!)
C(9, 4) = 9!/(4!(9-4)!)
C(9. 4) = 9!/(4!*5!)
C(9. 4) = (6*7*8*9)/(2*3*4)
C(9, 4) = 126 ways.