The ratio of ages of the father and the daughter at present is 3 : 1. Four year ago the ratio was 4 : 1 . The average age of the father and daughter 2 year hence will be

24
26
25
36

Correct Answer: 36

Explanation:

Let the present ages of father be 3x and daughter be x .
so the 4 year ago father's age and daughter's age was
( 3x - 4 ) and ( x - 4 )
⇒ ( 3x - 4 / x -4 ) = 4 / 1
∴ x = 12 year and 3x = 36 year

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