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28-06-2016
Mathematics

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average after 8 test is 91%. if he gets a 78% on his 9th test what will be the new acerage

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Аноним Аноним

28-06-2016

All you need to do is add te averages together then divide them by 2. 91%+78%=169% 169%÷2=84.5% So the new test average is 84.5%

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