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The average age of 14 girls and their teacher’s age is 15 years. If the teacher’s age is excluded, the average reduces by 1. What is the teacher’s age?
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- 35 years
- 32 years
- 30 years
- 29 years
- 35 years
Correct Option: D
According to question ,
Total age of 14 girls + 1 teacher = 15 × 15 = 225 yrs.
Average age of 14 girls = 14 yrs.
∴ Total age of 14 girls = 14 × 14 = 196 yrs.
∴ Teacher’s age = 225 – 196 = 29 yrs.
