Class 10r sat a test.
the mean mark for the class was 70%.
there are 30 students in clas...
Mathematics, 22.09.2019 21:30, kitttimothy55
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: 3
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