How do you solve :
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?

Question

How do you solve : 
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?

jim_thompson5910 · Answer

Let S = sum of all the scores

Since "He mistakenly divided the correct sum of all of his test scores by 6, which yielded 84.", we know that S/6 = 84


Solve for S:

S/6 = 84

S = 84*6

S = 504

So the sum of all the scores is 504


To find the correct average, divide the sum S by 7

S/7 = 504/7 = 72

So Adam's correct average test score is 72

anonymous · Answer

ty

jim_thompson5910 · Answer

you're welcome

precal · Answer

is this the one?  I would go with jim's solution.  He knows his math