What would missing value be if the other values were 91, 92, and 96 and the average was 94

Question

In science class you gave taken 4 tests & scored the following: 88, 96, 93, 99.  In math you have only taken 3 tests so far & scored the following: 91, 92, 96. What do you I need to score on the next math test to have the same average in math and science?

Answer 1

averaej av 3 numbers=94 tell yu sum=3*94=282

if yu hav 91+92=183, need=(282-183)=99