The average weight of Rupesh, Mandar and Ketan is 45 kg. If the average weight of
Rupesh and Mandar be 43 kg and that of Mandar and Ketan be 45 kg, then the weight of Mandar (in kg) is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 41.
Rupesh + Mandar + Ketan = 3 × 45 = 135
Rupesh + Mandar = 2 × 43 = 86
Mandar + Ketan = 2 × 45 = 90
Now: Rupesh + Mandar + Ketan = (Rupesh + Mandar) + (Ketan)
135 = 86 + Ketan → Ketan = 49
Mandar + Ketan = 90 → Mandar + 49 = 90 → Mandar = 41