Class 10R sat a test.
The mean mark for the class was 70%.
There are 30 students in clas...
Mathematics, 06.05.2020 08:30, dillondelellis2006
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 boys in the test was 62%.
Work out the mean mark for the girls
Answers: 2
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