Question 918693
p(nonstop) = .40, p(not non-stop) = .60,  n = 30
B. exp = .40*30 = 12  and s ={{{sqrt(.40*.60*30)}}}
C. P(none) = .60^30
D. P(x=3) = binompdf(30, .40, 3)  0r P = {{{30C3(.40)^3(.60)^27}}}