Question 333871
84,82,81, and 79
(84+82+81+79+x)/5=84
(326+x)/5=84 cross multiply
326+x=5*84
326+x=420
x=420-326
x=94 ans. for the grade of the fifth test.
Proof:
(84+82+81+79+94)/5=84
420/5=84
84=84