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How many sisters does M have? Statement I: M's father has exactly three children. Statement II: M has two brothers.

Competition practiceData Sufficiency
  • AStatement II alone is sufficient but Statement I alone is not
  • BStatement I alone is sufficient but Statement II alone is not
  • CBoth statements together are needed (neither alone is sufficient)
  • DEither statement alone is sufficient

Step-by-Step Solution

There are three children in all (I), and two of them besides M are brothers (II), so M has no sisters. Neither statement alone gives both the total and the composition.
Answer: C) Both statements together are needed (neither alone is sufficient)

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