SOLUTION: Jon’s first three test grades were 75, 77, and 67. What does he need to make on his fourth test to bring his test average up to a 76?

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Question 1140090: Jon’s first three test grades were 75, 77, and 67. What does he need to make on his fourth test to bring his test average up to a 76?
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39621) About Me  (Show Source):
Answer by greenestamps(13203) About Me  (Show Source):
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The average of his first two tests is 76; if the average of all four is to be 76, then the average of the last two has to be 76.

His third test, 67, is 9 points below the average he wants; the fourth test, to counter that, has to be 9 points above the average he wants....

Solved by logical reasoning and simple arithmetic....