SSC CGL 26 Oct 2014 Shift 1 Paper

Question : 116 of 200

Marks: +1, -0

Out of 30 teachers of a school, a teacher of age 60 years retired. In his place another teacher of age 30 years was appointed. As a result, the mean age of the teachers will

decrease by 2 years
decrease by 6 months
decrease by 1 year
remain same

Validate

Solution:

Decrease in total age
= 60 – 30 = 30 years
Decrease in average age
=

{30}/{30}

= 1 year

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