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Overview
Question Progress
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Exam Paper Progress
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There are 10 girls and 20 boys in a class.
The class has a test.
The mean mark for all the class is 70
The mean mark for all the boys is 62
Work out the mean mark for the girls.
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Overview Question Progress 1 2 3 4 Exam Paper Progress 1580 5 There Are 10 Girls And 20 Boys In A Class The Class Has A Test The Mean Mark For All The Class Is class=

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