Arithmetic Aptitude - Problems On Age - Discussion

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Q.

The Average age of a class of 22 subjects in 21 years. The average increased by 1 when the teacher's age also included. What is the age of the teacher ?                         


A. 44 B. 43
C. 41 D. 40

Answer: Option A
Explaination:

 


Avg x Number = Total


21 years x 22 nos = 462 years ....(1)

22 years x 23 nos = 506 years ....(2)

Teacher's age = (2) - (1) = 506 - 462 = 44 Years.


Discussion

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