Question 113

The average age of four members of a family is 32 years. If the age of a guest is included, then the average age increases by 12.5%. What is the age (in years) of the guest?

Solution

Given, the average age of four members of a family = 32 years

Then, total age of the family members will be (32 x 4) = 128 years

If the age of a guest is included then average becomes (12.5% of 32) = 36 years

Now, total age of the family including the age of guest = 36 x 5 = 180

Age of the guest = 180 -128 = 52 years

Hence, option A is the correct answer.

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