Mathematics · Averages
The average age of 'x' students in class 8 is (x – 8) years. If two teachers whose ages are 40 years and 44 years join the class, then the average age of the people in class 8 increases by 2 years. In class 9, there are (x + 36) students out of which 40% are girls. In class 9, if the average age of each girl is 15 years and that of each boy is 20 years, then find the average age of each student in class 9.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 116 years
- 217 years
- 318 years✓
- 419 years
Correct answer
18 years
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