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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?

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?
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1 vote
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?

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User Arno Tenkink
by
8.3k points

1 Answer

3 votes
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
answered
User Kwana
by
7.4k points
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