Carol, the band director, tracked how many minutes each saxophone player practiced last week. She found that Sven practiced for 30 minutes, Li Mihn practiced for 45 minutes, Wendy practiced for 90 minutes, Thomas practiced for 75 minutes, and Gabriel practiced for 60 minutes. Find the mean length of practice time.

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is