The average weight of 4 friends Utkarsh, Ashu, Kamal & Himanshu is 100. If the average weight of Ashu & Kamal is 60, and that of Ashu & Himanshu is 72.5, then find the weight of Utkarsh if the weight of Kamal is 55?
1). 150
2). 125
3). 175
4). 200
⇒ Total weight of 4 friends = 100 × 4 = 400
⇒ Combined weight of Ashu & Kamal = 60 × 2 = 120
⇒ Weight of Ashu = 120 – 55 = 65
⇒ Combined weight of Himanshu & Ashu = 72.5 × 2 = 145
⇒ Weight of Himanshu = 145 – 65 = 80
∴ Weight of Utkarsh = 400 – (65 + 55 + 80) = 400 – 200 = 200 kgs