1. The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy last at least 300days? Round to four decimal places.
2. In a certaintown, 10% of people commute to work by bicycle. If a person is selected randomly from thetown, what are the odds against selecting someone who commutes bybicycle?
3. Find themean, , for the binomial distribution which has the stated values of n and p. Round answer to the nearest tenth.

n =676 p= 0.7