Mathematics · Average

The average age of 10 students in a class increases by 1 year when a 30-year-old teacher joins them. What was the original average age of the students?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

121 years
220 years
319 years✓
418 years

Correct answer

19 years

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The average age of 10 students in a class increases by 1 year when a 30-year-old teacher joins them. What was the original average age of the students?

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The average age of 10 students in a class increases by 1 year when a 30-year-old teacher joins them. What was the original average age of the students?

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