Question 913728
p(spam) = .37, n = 7
P(x=3) = binompdf(7, .37, 3) 0r P = 7C3(.37)^3(.63)^4
P(x = 7) = binompdf(7, .37, 7) 0r P = (0.37)^7
P(x = 0) = (.63)^7
d) expected = {{{.37*7}}}