Mathematics, 16.07.2019 21:00 aliviafrancois2000

There are 30 students in a year 10 maths class. in the latest test the 21 girls in the class score a mean of 61%. in the same test the 9 boys in the class scored a mean of 78%. calculate the mean for the whole group of students.

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There are 30 students in a year 10 maths class. in the latest test the 21 girls in the class score a...

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