Data sufficiency question: Two statements (I) and (II) given. Determine which combination is sufficient to answer the question about a numeric/logical condition.

Statement I alone is sufficient.
Statement II alone is sufficient.
Either statement I or II alone is sufficient.
Both the statements I and II together are needed to answer the question.

Correct answer: Both the statements I and II together are needed to answer the question.

Solution

Statement I alone is insufficient. Statement II alone is insufficient. Only when both statements are combined can the question be answered definitively.

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