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Renee1996
Renee1996 Renee1996
  • 18-05-2016
  • Mathematics
Answered

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

Verified Answer :

sofiemolofie
sofiemolofie sofiemolofie
  • 18-05-2016

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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