Mathematics · Averages
In a hostel, the average age of 30 students was 18 years. Later, 5 students left and 5 new students joined, and the average age of the new group became 17.2 years. If the average age of the 5 students who left was 20.4 years, find the average age of the 5 students who joined.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 117.4 years
- 216.2 years
- 315.6 years✓
- 414.8 years
Correct answer
15.6 years
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