look at the number of leters robin sorted at her job at the post office.

what is the mean number of letters sorted? day------letters
sat. 105
Mon. 97
Tues. 88
Wed. 86

please! show me how to do this problem.thanks!!

Mean is the average

ADD the number of letters and divide by the number of numbers.

105 + 97 + 88 + 86 = sum
Average = sum/4