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The average weight of A, B and C is 65 kg. If the average weight of C and B is 61.5 kg, and the average weight of A and C is 68.5 kg, then the weight of C (in kg) is:1. 652. 683. 674. 60 |
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Answer» Correct Answer - Option 1 : 65 Given: Average weight of A, B and C = 65 kg Average weight of C and B = 61.5 kg Average weight of A and C = 68.5 kg Formula used: Average = sum of weights/No of persons Calculation: Weight of A, B and C ⇒ (A + B + C)/3 = 65 ⇒ A + B + C = 195 Weight of C and B ⇒ (C + B)/2 = 61.5 ⇒ C + B = 123 Weight of A and C ⇒ (A + C)/2 = 68.5 ⇒ A + C = 137 Weight of A ⇒ 195 - 123 ⇒ 72 Weight of C A + C = 137 ⇒ C = 137 - 72 ⇒ 65 Kg ∴ The weight of C is 65 Kg. |
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