Mathematics · Averages

The average age of 30 students in a class is 11 years. When the teacher's age is included, the average age becomes 12 years. What is the teacher's age?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

140 years
246 years
344 years
442 years✓

Correct answer

42 years

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The average age of 30 students in a class is 11 years. When the teacher's age is included, the average age becomes 12 years. What is the teacher's age?

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The average age of 30 students in a class is 11 years. When the teacher's age is included, the average age becomes 12 years. What is the teacher's age?

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