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Question: How many pages of book X did Robert read on Sunday? Statements: The book has 300 pages out of which two-thirds were read by him before Sunday. Robert read the last 40 pages of the book on the morning of Monday.

I alone is sufficient while II alone is not sufficient
II alone is sufficient while I alone is not sufficient
Either I or II is sufficient
Neither I nor II is sufficient
Both I and II are sufficient

Correct Answer: Both I and II are sufficient

Explanation:

From I and II, we find that Robert read (300 x 2/3) i.e. 200 pages before Sunday and the last 40 pages on Monday.

This means that he read [300 - (200 + 40)] i.e. 60 pages on Sunday.

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