The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days.

Is this is binomial probability or normal probability? (selectl binomial or normal)

What function you use on your calculator? (select binomialpdf or binomialcdf or normalcdf)

Find the probability of a pregnancy lasting less than 250 days.. (label as ab.cd%)