The average weight of 8 students is 48 kg. If the average weight of the first 5 students is 45 kg, what is the average weight of the remaining students?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 53 kg
The weight of the remaining students is the total of all 8 minus the total of the first 5, shared among the other 3.
Total weight of 8 students \(=8\times48=384\) kg
Total weight of the first 5 \(=5\times45=225\) kg
Total weight of the remaining 3 \(=384-225=159\) kg
\(\displaystyle \text{Average}=\frac{159}{3}=53\) kg
The average weight of the remaining students is 53 kg.