Mathematics · Statistics
The average age of 40 students of a class is 12 years. After adding the teacher's age, the average age of all of them becomes 13 years. If the retirement age of the teacher is 55 years, after how many years will he retire?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 15 years
- 23 years✓
- 32 years
- 41 year
Correct answer
3 years
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