Find the indicated probabilit.

There are 12 members on the board of directors for the Kaweah delta hospital. If they must elect a chairperson, a vice chairperson, a secretary, and a 2-person ethics subcommittee, how many ways are there to do this?

Find the indicated probability. 20. The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability that a human pregnancy lasts at most 282 days. Round to four decimal places