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%?
-----
Equation:
Average = (5*84+x)/6 = 87
-----
(420+x) = 522
x = 102
Note: He cannot average 87 for 6 tests.
Cheers,
Stan H.
(