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Q24. In a family of three generations, there are eight members. How many married couples are there in the family? Statement I. R is the son of P. S is the sibling of R and has only one son. V is the grandson of Q. Statement II. U has no siblings. W is the daughter-in-law of U. P is the sibling of T. Statement III. Q is the sister-in-law of T and has no siblings. U is the brother-in-law of R.

1. If the data in statement I is sufficient
2. If the data in statement II is sufficient
3. If the data in statement II and statement III are sufficient to answer the question.
4. If the data in all the statements I, II and III are necessary to answer the question.
5. If the data in statement III is sufficient

Correct answer: If the data in all the statements I, II and III are necessary to answer the question.

Solution

Each statement provides only part of the family structure. Statement I identifies some parent-child links, Statement II adds sibling and in-law relations, and Statement III connects the remaining members through marriage relations. Only by combining all three can the number of married couples be determined.

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