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The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:

A. 17 kg B. 20 kg
C. 26 kg D. 31 kg

Read Solution (Total 1)

let d sum of a, b, c is 3*45=135
and sum of a and b s 2*40=80
sum of b and c is 3 *43=86
hence 80+86-135=31
ans=31
10 years agoHelpfull: Yes(2) No(1)

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In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?

A. 67 kg. B. 68 kg.
C. 69 kg. D. Data inadequate
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A. 47.55 kg B. 48 kg
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