Three year ago the average age of a family of five members was 27 years. The present average age is also 27 year after the inclusion of a child into the family. Find the age of the child
Correct Answer: Description for Correct answer:
Total age of 5 members(3 year ago) = 27 X 5 =135 yr
Total age of 5 members(at present)
= 135 + (5 X 3 ) = 150 yr
Let the present age of child = x
\( \large27 = \frac{150 + x}{6} \)
= > x = 162 - 150 = 12 yr
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