SOLUTION: a pupil's average for five test is 84%. how many must he get in his sixth test so that his average on six tests will be 87%?
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Question 682155: a pupil's average for five test is 84%. how many must he get in his sixth test so that his average on six tests will be 87%?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a pupil's average for five test is 84%. how many must he get in his sixth test so that his average on six tests will be 87%?
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Equation:
Average = (5*84+x)/6 = 87
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(420+x) = 522
x = 102
Note: He cannot average 87 for 6 tests.
Cheers,
Stan H.
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