SOLUTION: You own 20 CDs. You want to randomly arrange 8 of them in a CD rack. What is the probability that the rack ends up in alphabetical order?

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Question 1135532: You own 20 CDs. You want to randomly arrange 8 of them in a CD rack. What is the probability that the rack ends up in alphabetical order?

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


The total of 20 CDs is irrelevant....

Once 8 of them are chosen, the number of different ways to arrange them on the rack is 8! = 40320.

Of those, only one of them has the 8 CDs in alphabetical order.

ANSWER: 1/40320