Thread: averages

Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adam’s correct average test score?

Originally Posted by abner80

Adam tried to compute the average of his 7 test scores. He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84. What is Adam’s correct average test score?

Let the correct sum be S.

Then correct average = S/7.

It's given that S/6 = 84 => S = .....

Now substitute the value of S to get the correct average.