Ten years ago, the ratio of ages of father and son was 3 : 1. What are their present ages ?
I. The sum of their present ages is 60 years.
II. The ratio of their ages five years hence would be 9: 5.
III. Ten years ago, the son's age was 1/3 of the father's age

Only III

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Both I and III

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Both II and III

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Either (B) or (C)

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Solution

The correct option is D Either (B) or (C)
The son's and fatther's age make for 2 variables. We already have one equation from A. B and C can provide the other equation. Only 1 of them is required.

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Ten years ago, the ratio of ages of father and son was 3 : 1. What are their present ages ?I. The sum of their present ages is 60 years.II. The ratio of their ages five years hence would be 9: 5.III. Ten years ago, the son's age was 1/3 of the father's age

The correct option is D Either (B) or (C)The son's and fatther's age make for 2 variables. We already have one equation from A. B and C can provide the other equation. Only 1 of them is required.

Ten years ago, the ratio of ages of father and son was 3 : 1. What are their present ages ?
I. The sum of their present ages is 60 years.
II. The ratio of their ages five years hence would be 9: 5.
III. Ten years ago, the son's age was 1/3 of the father's age

The correct option is D Either (B) or (C)
The son's and fatther's age make for 2 variables. We already have one equation from A. B and C can provide the other equation. Only 1 of them is required.