Mathematics, 22.02.2021 19:10 ayoismeisalex

There are 5 boys and 10 girls in a class. The class has a test.

The mean mark for all the class is 60.

The mean mark for the girls is 50.

Work out the mean mark for the boys.

Answers: 1

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There are 5 boys and 10 girls in a class. The class has a test.

The mean mark for all...

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