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Blizzard [7]
2 years ago
11

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

Mathematics
1 answer:
Vika [28.1K]2 years ago
6 0
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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