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The average weight of P, Q and R is 47 kg. If the average weight of P and Q be 32.5 kg and that of Q and R be 48.5 kg, then what is the weight of Q (in kgs)?1). 252). 213). 294). 33 |
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Answer» <P>Let the weight of P, Q and R be p, q and r According to the problem statement ⇒ (p + q + r)/3 = 47 ⇒ p + q + r = 141----(i) Now GIVEN that average weight of P and Q is 32.5 kg ⇒ (p + q) /2 = 32.5 ⇒ p + q = 65 ----(ii) Now, (i) - (ii) Now given that average weight of Q and R is 48.5 kg ⇒ (q + r)/2 = 48.5 ⇒ q + r = 97 Using (iii) ⇒ q = 97 - 76 = 21 years ∴ the weight of q is 21 years |
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