Maths

In a class of boys and girls the mean weight of 8 boys is 55kg and the mean weight of a group of girls os 48kg the mean weight of all the children is 50.8kg how many girls are there

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  1. In a class of boys and girls the mean weight of 8 boys is 55kg and the mean weight of a group of girls os 48kg the mean weight of all the children is 50.8kg how many girls are there

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  2. Just add up all the weights
    if there are g girls, then you know that
    55*8 + 48g = 50.8(8+g)
    Now just solve for g

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