You have made scores of 81, 76, 82 on Three quizzes. What is the least you can make on this quiz to have an average of at least 80?

Question

I tried solving this problem, but them got lost. How do i solve it?

Answer 1

81+76+82=239
239/3=79.6
81+81+76+82=320
320/4=80
your missing number or the grade you need to get is an 81 at least. if you make an 81. you will have an 80 as you average grade

Answer 2

Thank You so much :)

Answer 3

81+76+82=239
239/3=79.6
81+81+76+82=320
320/4=80
your missing number or the grade you need to get is an 81 at least. if you make an 81. you will have an 80 as you average grade