Renee1996 Renee1996

19-05-2016
Mathematics

contestada

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

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sofiemolofie sofiemolofie

19-05-2016

add all the scores together and the divided by the number of scores there are

8 tests will be 8x91 = 728

Then add on his latest test result 728+78 = 806

Now divide by the number of tests (9) 806/9 = 89.55555555
89.555%

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