10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.

10 books are placed at random in a shelf. The probability that a pa

1.	10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
A.	1/10
B.	9/10
C.	1/5
D.	3/10
Answer» D. 3/10

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10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.

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