Mathematics, 23.09.2019 23:00 adammouedden198

Class 10r sat a test.
the mean mark for the class was 70%.
there are 30 students in class 10r, 20 of whom are boys.
the mean mark for the boys in the test was 62%.
work out the mean mark for the girls

Answers: 1

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Class 10r sat a test. the mean mark for the class was 70%. there are 30 students in class 10r, 20 of whom are boys. the mean mark for the boys in the test was 62%. work out the mean mark for the girls

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Class 10r sat a test.
the mean mark for the class was 70%.
there are 30 students in class 10r, 20 of whom are boys.
the mean mark for the boys in the test was 62%.
work out the mean mark for the girls