In a class the average age of 30 students is 15 years. If the teacher is included then the average age is increased by one year. Find the age of the teacher. (a) 40 years (b) 45 years (c) 46 years (d) 48 years
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Answer:
Total age of 30 students
=30x15
=450
When teachers included then total members =31
And average =16
Total age include teacher = 31x16
=496
Age of teacher
= 496-450
=46
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