Mathematics, 22.09.2020 04:01 kaffolter25

Class 10R sat a test the mean mark for the class is 70% there are 30 students in that class 20 of whom are boys the mean mark for the boys is 62% find out the mean for the girls

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Class 10R sat a test the mean mark for the class is 70% there are 30 students in that class 20 of wh...

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