in an army camp, 300 soldiers had provisions for 13 days, if 40 of them are transferred to the other camp, how long will the provisions lasts? (with steps)

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)