| Direction: The questions is accompanied by three statements III and III. You have to determine which statement(s) is/are sufficient/necessary to answer the question. |
| I. Mohan is 20 years older than Sumit. |
| II. 5 years ago the ratio of the age of Sumit to that of Mohan was 17:30. |
| III. 4 years hence the ratio of Mohan's age to that of Sumit would be 2 : 1. |
A) Only I
B) Any two of them
C) Only II
D) Only III
E) Any one of the three
Correct Answer: B
Solution :
\[M=\frac{7}{4}S\] ?(i) From I. \[\text{M-S=20}\] From II. \[\frac{\text{S-5}}{\text{M-5}}\text{=}\frac{\text{17}}{\text{30}}\] From III. \[\frac{\text{M+4}}{\text{S+4}}\text{=}\frac{\text{2}}{\text{1}}\] Combining any of the statements with equation (i), the age of Mohan can be determined. Hence any two of them is sufficient,
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