Quantitative Aptitude • Ratio, Average & MixtureMedium
The average weight of 17 students increases by 1 kg when one student weighing 47 kg is replaced by a new student. What is the weight of the new student?
A. 17 kg
B. 64 kg✓ Correct Answer
C. 48 kg
D. 30 kg
💡 Solution & Explanation
If the average rises by 1 kg for 17 students, the total weight rises by 17 × 1 = 17 kg. The only change is the swap, so the new student weighs 17 kg more than the one who left: 47 + 17 = 64 kg.
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