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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: How many sons does X have ? Statements:
  1. Q and U are brothers of T.
  2. R is sister of P and U.
  3. R and T are daughters of X.

A Only I and II

B Only II and III

C All I, II and HI

D I, II and III together are not sufficient

E None of these

ANS:D - I, II and III together are not sufficient

Explanation: From I, II and III, we conclude that all P, Q, R, T and U are children of X. Of these, Q and U are male while R and T are female. But the sex of P cannot be determined.



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