Four friends are told that the average (mean) of their grades in their favorite class was 88%

Michael got 74%, Taylor got 94%, Anna got 86%, Ethan's grade was not revealed.

What grade did Ethan get.

First we have to find out the total. So we do 88 x 4 = 352 since it will give us the the total score when all of the scores are added. Then we add 74+94+86 which equals 254. And then 352 - 254 = 100 and that would be Ethan's score