Among live deliveries, the probability of a twin birth is .02. (a) In 2,000 live deliveries what is the probability of at least 50 twin births? (b) Fewer than 35? Explain carefully. Nationwide, the...

Among live deliveries, the probability of a twin birth is .02. (a) In 2,000 live deliveries what is the probability of at least 50 twin births? (b) Fewer than 35? Explain carefully.

Nationwide, the probability that a rental car is from Hertz is 25 percent. In a sample of 100 rental cars, what is the probability that fewer than 20 are from Hertz? Explain.