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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?(1) 35 years (2)32 years(3)30 years (4)29 years

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Solution

Total age of 14 girls + 1 teacher = 15 x 15 = 225 yrs.

Average age of 14 girls = 14 yrs.
:. Total age of 14 girls
= 14 x 14 = 196 yrs.
:. Teacher’s age
= 225 – 196 = 29 yrs.

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