The average age of the 30 woman decreases by 3 month if a new person Priyanka is included in place of 25 yr old woman. Calculate the age of Priyanka.

17.5 yr
20 yr
30 yr
22 yr

Correct Answer: 17.5 yr

Explanation:

Here, average decreases by 3 months of 3/12 yr.
Sum of ages decreased
= 30 x 3/12 = 15/2 = 7.5 yr
∴ Age of priyanka = (25 - 7.5) = 17.5 yr.

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