Question:The average age of `30`students of a class is `12` years .The average age of a group of `5`of the students is `10`years and that of another group of `5`of them is `14` years . What is the average age of the remaining students ? 

A `8 years` 
B `10 years` 
C `12 years` 
D `14 years` 

+ Answer
C 

+ Explanation
Total age of `20`students 

`= (30 xx 12) - (5 xx 10 + 5 xx 14)`

`= 240 years`

:. Required average

`= (240/20)`

`= 12 years`

+ Report

Irin Moni

Editor, VCampus

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