How do i figure out the average score?

Mathematics
Tutor: None Selected Time limit: 1 Day

Cory’s average score after 8 tests is 91%. If he gets a 78% on his 9th test what will his new average be?

May 31st, 2015

Total marks of the 8 subjects=8*91=728

 Marks for 9 subjects will be=728+ 78=806

The new average=806/9

                           =89.5556

May 31st, 2015

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May 31st, 2015
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May 31st, 2015
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