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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asked Jan 13, 2023 31.6k views

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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.

Mathematics
high-school

Paul Martin asked

by Paul Martin

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5 votes

Answer:

8 is the mean mark for the girls

Egorikas answered Jan 16, 2023

by Egorikas

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