Mathematics, 01.07.2019 17:00, 122333444469

Urgent brainliest given mr brown gives his class a test. the 10 girls in the class get a mean mark of 70%.the 15 boys in the class get a mean mark of 80%.nick says that because the mean of 70 and 80 is 75 then the mean mark for the whole class in the test is 75%. nick is not correct. is the correct mean less than or greater than 75%? you must justify your answer.

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Urgent brainliest given mr brown gives his class a test. the 10 girls in the class get a mean mark o...