1.

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

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)

⇒ r = 141 - 65 = 76----(III)

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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