SOLUTION: Manuel has scored 80,64,77 and on his previous three tests. What score does he need on his next test so that his average(mean)is 79?

Algebra ->  Average -> SOLUTION: Manuel has scored 80,64,77 and on his previous three tests. What score does he need on his next test so that his average(mean)is 79?       Log On


   

Question 713465: Manuel has scored 80,64,77 and on his previous three tests. What score does he need on his next test so that his average(mean)is 79?

Answer by persian52(161) About Me  (Show Source):
You can put this solution on YOUR website!
He needs 95
(Divide by how many numbers, there are 4 graded marks).
Therefore:
80+64+77+95 = 316 / 4 = 79