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in Mathematics by (83.9k points)

The mean weight of 150 students in a certain class is 60 kgs. The mean weight of boys in the class is 70 kg and that of girls is 55 kgs. Find the number of boys and the number of girls in the class.

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Let the number of boys and girls in the class be n1 and n2 respectively. Then

n1 + n2 = 150 ...(i)

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