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Data Sufficiency

Directions to SolveIn each of the following problems, there is one question and three statements I, II and III given below the question. You have to decide whether the data given in the statements is sufficient to answer the question. Read all the statements carefully and find which of the statements is/are sufficient to answer the given question. Choose the correct alternative in each question.

Q1: Question: Four subjects - Physics, Chemistry, Mathematics and Biology - were taught in four consecutive periods of one hour each starting from 8.00 a.m. At what time was the Chemistry period scheduled ? Statements:
  1. Mathematics period ended at 10.00 a.m., which was preceded by Biology.
  2. Physics was scheduled in the last period.
  3. Mathematics period was immediately followed by Chemistry.

A Only I

B Either I only or II only

C Only II

D Only II and III

E Only I and either II or III

ANS:E - Only I and either II or III

Explanation: From I and II, we conclude that Mathematics period began at 9.00 a.m., Biology period began at 8.00 a.m. and Physics period began at 11 a.m. So, the Chemistry period began at 10.00 a.m. From I and III, we conclude that Mathematics period ended and Chemistry period began at 10.00 a.m.



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