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Mathematics, 11.01.2021 20:20 alainacorkell6472

Class 10R sat a test, the mean mark for the class was 70%, there are 30 students in 10R, 20 are boys the mean mark for boys was 62% what is mean mark for girls

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Class 10R sat a test, the mean mark for the class was 70%, there are 30 students in 10R, 20 are boys...
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