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Multiple Choice Questions

Ram 39 s present age is three times his son 39 s present age and two fifth of his father 39 s presen...........

Quantitative Aptitude(Banking) Average

Ram's present age is three times his son's present age and two-fifth of his father's present age. The average of the present age of all of them is 46 years. What is the difference between the Ram’s son’s present age and Ram's father's present age?

68 years

88 years

58 years

78 years

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Explanation:

(Tricky approach)
Let Present age of Ram’s son = x years
∴ Ram’s present age = 3x years
Ram’s father’s present age = 15x/2 years
∴ x + 3x + 15x/2 = 46 × 3
= 23x = 46 × 3 × 2
= x = 12
∴ Required difference
= 15x/2 – x = 13x/2
= (13 × 12)/2
= 78 years

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