Question

Currently, you have made

78, 83, and an 80 on your tests in math. What do you need to make on the next test in order to get an average of an 82?

Answer 1

87

Explanation:

Mean(or average) = 82

let 'x' be the last test marks

Sum of marks of tests/Number of tests = Mean

(78 + 83 + 80 + x)/4 = 82

241 + x = 82 × 4

241 + x = 328

x = 328 - 241

x = 87