Angela’s average for six math tests is 87. On her first four tests she had score

Mathematics
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Angela’s average for six math tests is 87. On her first four tests she had scores of 93, 87, 82, and 86. On her last test, she scored 4 points lower than she did on her fifth test. What scores did Angela receive on her fifth and sixth tests?

A.    fifth test = 85; sixth test = 89
B.fifth test = 90; sixth test = 86
C.fifth test = 89; sixth test = 85
D.fifth test = 85; sixth test = 81
Apr 29th, 2015

Averages are always adding the numbers and dividing by the amount.  In this case you take the test scores given, and add the fifth and sixth test scores then divide by 6 (for the six tests total).  Your answer would be C because 93+87+82+86+89+85=522 (total amount for all 6 test scores) then 522/6=87. 

Apr 29th, 2015

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