Question
10 books are placed at random in a shelf. The probability that a pair of books will always be together is -
Answer: Option C
10 books can be rearranged in 10! ways consider the two books taken as a pair then number of favourable ways of getting these two books together is 9! 2!
∴ Required probability = $$\frac{{1}}{{5}}$$
Was this answer helpful ?
10 books can be rearranged in 10! ways consider the two books taken as a pair then number of favourable ways of getting these two books together is 9! 2!
∴ Required probability = $$\frac{{1}}{{5}}$$
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution