The average age of 5 members of a family is 25 yr. If the servant of the family is included, the average age increases by 40%. What is the age of servant?
Correct Answer: Description for Correct answer:
Total age of 5 members
= =\( \Large 25 \times 5 = 125 yr \)
Total age of 5 members and the servant
=\( \Large \left(25+25 \times \frac{40}{100}\right) \times 6 \)
= \( \Large 35 \times 6 \) = 210 yr
Therefore, Age of the servant = 210 - 125 = 85 yr
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