Problems adapted from questions set for previous Mathematics exams.
There is a total of 60 students in the school orchestra.
The mean age of the 24 boys is 15.5 years.
The mean age of the 36 girls is 16.4 years.
Calculate the mean age of all 60 students.
A basket contains apples and oranges. The mean weight of the 9 apples in the basket is 265g. The mean weight of all 21 items of fruit in the basket is 290g.
Work out the mean weight of the oranges.
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