2 years ago

If Olivia has 68,79, and 74 for his 3 tests, what must he get on his 4th test in order to have an 80 average?

1 answer:

3 0

The other person did not explain so I will:
(68+79+74)= 221/3 =73.7
80 x 4 = 320
320-221 = 99
He must get 99 on his 4th test.
Thanks

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