The average weight of A, B and C is 65 kg. If the average weight of A and B be 60 kg and that of B and C be 70 kg, then the weight of A is:	Select the correct option: A) 55 kg B) 65 kg C) 75 kg D) 45 kg E) 63 kg
EXPLANATION   Let A, B, C represent their respective weights. Then, we have:   A + B + C = (65 x 3) = 195 â€¦. (i)   A + B = (60 x 2) = 120 â€¦. (ii)   B + C = (70 x 2) = 140 â€¦.(iii)   Adding (ii) and (iii), we get: A + 2B + C = 260 â€¦. (iv)   Subtracting (i) from (iv), we get : B = 65.   SUBSTITUTING B IN (ii)   A+65=120   A=55   Aâ€™s weight = 55 kg.   55 kgnswer 55 kg
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The average weight of A, B and C is 65 kg. If the average weight of A and B be 60 kg and that of B and C be 70 kg, then the weight of A is: