SOLUTION: In Algebra class, Michael has scored an 80, 79, 74, and a 87. What score does Bob need on his fifth test to obtain an average of 84? (Assume all tests are equally weighed)

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Question 758128: In Algebra class, Michael has scored an 80, 79, 74, and a 87. What score does Bob need on his fifth test to obtain an average of 84? (Assume all tests are equally weighed)
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
An average of 84 from 5 tests requires
a total of 5 x 84 = 420.
At present Michael has a total of
320 (80+79+74+87)
So, 420 - 320 = 100
Michael must score 100 to have
an average of 84 from the 5 tests.
Hope this helps.
:-)