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Tanzania [10]
3 years ago
5

John got a 76, 68, and 83 on his first three test. What score does he need on his fourth test to achieve an 80 average?

Mathematics
1 answer:
shepuryov [24]3 years ago
3 0
It's 93.
simple calculate it by:
(76+68+83+x)/4=80
then 73*5-(67+75+73+69)=x
where x here is the grade needed to reach an av. of 80. 4 is the number of tests.
*common answer*
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