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The mean weight of 150 students in a cla...

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

A

50

B

60

C

75

D

100

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The correct Answer is:
A
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ARIHANT SSC-AVERAGE -EXERCISE BASE LEVEL QUESTION
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