SOLUTION: Sonya's average so far is 84 for 3 math tests. What must she get on the fourth test to have an average (mean) of 88?
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Question 802242: Sonya's average so far is 84 for 3 math tests. What must she get on the fourth test to have an average (mean) of 88? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Sonya's average so far is 84 for 3 math tests. What must she get on the fourth test to have an average (mean) of 88?
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Points on the 3 math tests:: 3*84 = 252
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Equation:
(252+x)/4 = 88
252+x = 352
x = 100 (score she needs on the 4th test)
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Cheers,
Stan H.
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