Multiple choice

The average age of 14 girls and their teacher’s age is 15yr. if the teacher’s age is excluded, then the average reduces by 1. What is the teacher’s age?

  1. 29yr

  2. 35yr

  3. 32yr

  4. 30yr
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A Correct answer
Explanation

Total age of 14 girls and teacher = 15 * 15 = 225. Total age of 14 girls = 14 * 14 = 196. Teacher's age = 225 - 196 = 29.

AI explanation

The total age of the 14 girls and the teacher is 15 multiplied by 15, which equals 225 years. When the teacher's age is excluded, the average reduces by 1 to 14 years, making the total age of the 14 girls 14 multiplied by 14, which equals 196 years. The teacher's age is the difference between the two totals, which is 225 - 196 = 29 years.

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