SSC JE Electrical Engineering 2011 Paper

Question : 26 of 150

Marks: +1, -0

The average age of 10 children in a class is 12 years. If two children aged 14 and 16 years join the class, it will raise the average age by how much?

2 months
4 months
6 months
8 months

Validate

Solution:

Total age to 10 children = 120
after adding two more children = 150
Now total children = 12
∴ average age =

150/12=12.5

Raised by .5 years= 6 months

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