1.

Average weight of P and Q is 32 kg. Average weight of Q and R is 43 kg. Average weight of P and R is 51 kg. What is the average weight (in kg) of P, Q and R?1). 442). 423). 404). 38

Answer»

? Average WEIGHT of P and Q is 32 kg

⇒ Sum of their weight = 2 × 32 = 64

⇒ P + Q = 64 kg (1)

Similarly,

Q + R = 86 kg (2)

P + R = 102 kg (3)

Adding EQUATION (1), (2) and (3)

2P + 2Q + 2R = 64 + 86 + 102 = 252

⇒ P + Q + R = 126 kg

∴ Average weight of P, Q and R = (P + Q + R)/3 = 126/3 = 42 kg


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