Problema Solution
If Peter received grades of 88, 83, 75, and 80 on his four English exams, what is the minimum grade he has to score on his fifth exam to have an average of at least 85 for the class?
Answer provided by our tutors
let it be x
(88+83+75+80+x)/5 = 85
326 + x = 425
x=99 [Ans.]