Three Statements S1, S2 and S3 are given below followed by a Question: S1: C is younger than D, but older…

Three Statements S1, S2 and S3 are given below followed by a Question: S1: C is younger than D, but older than A and B. S2: D is the oldest. S3: A is older than B. Question: Who among A, B, C and D is the youngest? Which one of the following is correct in respect of the above Statements and the Question?
  1. S1 alone is sufficient to answer the Question.
  2. S1 and S2 together are sufficient to answer the Question.
  3. S2 and S3 together are sufficient to answer the Question.
  4. S1 and S3 together are sufficient to answer the Question.

Solution

S1 says C is older than both A and B, so the youngest is either A or B; S1 alone cannot tell which. S3 says A is older than B. Combining S1 (youngest is A or B) with S3 (A older than B) shows B is the youngest. S1 and S3 together are sufficient.

Asked in: CSAT 2020

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