Mathematics, 29.09.2020 14:01 oof529
There are 10 boys and 20 girls in a class
they have a test
the mean mark is 60
the mean mark for the girls are 54
mean for the boys?
Answers: 1
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There are 10 boys and 20 girls in a class
they have a test
the mean mark is 60
the mean...
the mean mark is 60
the mean...
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