Question

(d) 5.5 (e) None of these
7. The average weight of a group of 150 students in a class in 60 kg. If the
mean of weights of all the 50 male students in the class is 70 kg, then the
average weight of 100 girls in the class is.
a) 65 kg (b) 50 kg (c) 60 kg
d) 55 kg (e) None of these
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