Question

105. The mean weight of 150 students in a
certain class is 60 kg. The mean weight
of boys is 70 kg and that of girls is
55 kg. What are the number of boys
and girls respectively in the class?
(a) 75 and 75
(b) 50 and 100
(c) 70 and 80
(d) 100 and 50​

Answer 1

Answer:

answer is (a) 75 and 75

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