SSC CGL 11 Aug 2017 Shift 1 Paper

Question : 56 of 100

Marks: +1, -0

The average age of a class of 6 girls is x years. Four new girls having ages x - 2 , x + 2, x + 4 and x + 6 join the class. What is the new average age (in years) of the class ?

x + 1
x + 2
2.5x
x + 2.5

Validate

Solution:

The new average age =

{6 x + x - 2 + x + 2 + x + 4 + x + 6}/10

{10x + 10}/10

={10(x+1)}/10=x+1

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