Question

Four friends are told that the average (mean) of their grades for their favorite class is 84.5%.



Anthony got 86%, Jasmine got 92%, and Kaitlyn got 70%.

Jonathan's grade was not revealed.
What grade did Jonathan get?
PLEASE HELP SOON

Answer 1

Multiply the average by number of people:

84.5 x 4 = 338

This means the total of the 4 grades need to equal 338

To find Jonathan’s grade subtract the other 3 grades from 338:

338 - 86 - 92 -70 = 90

Jonathan’s grade was 90