SOLUTION: You receive grades of 89, 79, 82, 91, and 92 on your last five math exams. What grade must you get on the final exam in order to make your average grade at least 75?

Question 939044: You receive grades of 89, 79, 82, 91, and 92 on your last five math exams. What grade must you get on the final exam in order to make your average grade at least 75?
Answer by srinivas.g(540) (Show Source): You can put this solution on YOUR website!
grades on first 5 maths exams = 89,79,82,91 &92
sum of grades on 5 exams = 89+79+82+91+92
= 433
let x be the grade on last exam
hence total = 433+x
average = 75

x= 450-433
x= 17
Hence he should get at least 17 marks on last exam
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