The average age of 14 girls and their teacher's age is 15 yr. If teacher's age is excluded then the average reduced by 1. What is the teacher's age?

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Accepted Answer

Sum of 14 girls and teacher age = 15 x 15 = 225 Without teacher's age sum of 14 girls age = 14 x 14 = 196 ∴ Teacher's age = 225 -196 = 29 year

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