Mathematics, 14.04.2020 14:55 hernandezbrandon059
There are 10 boys and 20 girls in Mrs Brook's class.
Mrs Brook gave all the class a test.
The mean mark for all the class is 60
The mean mark for the girls is 56
Work out the mean mark for the boys.
Answers: 2
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There are 10 boys and 20 girls in Mrs Brook's class.
Mrs Brook gave all the class a test.
...
Mrs Brook gave all the class a test.
...
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