Question 12
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In how many ways can the books be arranged on a shelf?
I. Some of them are maths books.
II. There are 3 different maths books and 2 different physics books, all to be shelved.
- A Statement I alone is sufficient, but Statement II alone is not sufficient
- B Statement II alone is sufficient, but Statement I alone is not sufficient Correct
- C Each statement alone is sufficient
- D Both statements together are sufficient, but neither statement alone is sufficient
- E Statements I and II together are not sufficient
Correct Answer: Option B
I: number of books unknown. Not sufficient.
II: 5 different books → 5! = 120. Sufficient.
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