A student is selling magazines for school fundraisers. There is a 20 percent chance that a given house will buy a magazine. He needs to sell five magazines. Determine the probability that he will need to visit 5, 6, 7,. ....100 houses to sell five magazines.
n = 5, p = 0.2, q = 1 – p = 0.8
P(x) = C(n, x)