Question
The average of the current ages of Armaan, Biju, Chinky,
and Danny is 31 years. Two years from now, the average age of Armaan and Biju will be 22 years. Given that the present age ratio of Chinky to Danny is 4:3, determine the current age of Danny.Solution
ATQ, Sum of the present ages of ‘Armaan’, ‘Biju’, ‘Chinky’ and ‘Danny’ = 31 × 4 = 124 years Sum of the ages of ‘Armaan’ and ‘Biju’, 2 years hence = 22 × 2 = 44 years Sum of the present ages of ‘Armaan’ and ‘Biju’ = 44 – 2 – 2 = 40 years Sum of the present age of ‘Chinky’ and ‘Danny’ = 124 – 40 = 84 years Present age of ‘Danny' = 84 × {3/(4 + 3)} = 36 years
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