Mathematics, 26.03.2021 15:20, AquaNerd5706

Mr Brown gives his class a test. The 15 girls in the class get a mean mark of 75%
The 20 boys in the class get a mean mark of 60%
Nick says that because the mean of 75 and 60 is 67.5 then the mean mark for the whole
class in the test is 67.5%
Nick is not correct.
Is the correct mean mark less than or greater than 67.5%?
You must justify your answer.

Answers: 1

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Mr Brown gives his class a test. The 15 girls in the class get a mean mark of 75%
The 20 boys...