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1. The average age of a class of 35 students is 14 years. If the teacher's age is included the average age increases by one year. Find the age of the teacher.
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Answer:
The average age of a class of 35 students is 14 years.
Sum of age of students,
= 35*14 = 490
If the teacher's age is included the average age increases by one year.
Average = 14 + 1 = 15
Sum of age of teacher and students,
= 36*15 = 540
So the age of the teacher,
540 - 490 = 50 years
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