The average age of class of 24 students and their teacher is 15 years. Without the teacher, the average age of the class reducea by 1 year . What is the age of teacher?
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Avg of boys when teacher INCLUDED = (24+1)*15 = 375
avg of boys when teacher is EXCLUDED= 24 * 14 = 336 ( Because in Question, given that average is decreased by 1 when teacher is excluded) .
So age of Teacher = 375-336 = 39.
avg of boys when teacher is EXCLUDED= 24 * 14 = 336 ( Because in Question, given that average is decreased by 1 when teacher is excluded) .
So age of Teacher = 375-336 = 39.
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