Mathematics · Averages
The average age of a teacher and three students is 20 years. If all three students are of the same age and the difference between the age of the teacher and a student is 20 years, then the age of the teacher is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 135 years✓
- 230 years
- 345 years
- 425 years
Correct answer
35 years
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