NIACL Model Paper 2 with solutions for free online practice

Question : 21 of 100

Marks: +1, -0

Average age of 36 children of the class is 15 years. 12 more children joined whose average age is 16 years. What is the average age of all the 48 children together?

15.25 years
15.5 years
15.3 years
15.4 years
None of these

Validate

Solution:

Required average age
=

[{15×36+12×16}/{36+12}]

years

=[{540+192}/48]

years
=15.25 years

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