Here is the histogram of a data distribution. All class widths are 1. Which of the following numbers is closest to the mean of this distribution?

Look at image :)

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same