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?
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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) (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
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