Suppose the number of cell phones in a household has a binomial distribution

Question

with parameters n = 17, and p = 40 %.
Find the probability of a household having (Keep at least 4 digits)
(a) 11 or 13 cell phones?

(b) 11 or fewer cell phones ?

(c) 14 or more cell phones ?

(d) fewer than 13 cell phones ?

(e) more than 11 cell phones ?

Answer 1

(a) 0.2545
(b) 0.7372
(c) 0.2628
(d) 0.4827
(e) 0.5173