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  3. you own 15 cds you want to randomly arrange 8...

Question: you own 15 cds you want to randomly arrange 8...

Question details
You own 15 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?

The probability that the CDs are in alphabetical order is ?




A bag contains 9 red marbles, 7 white marbles, and 8 blue marbles. You draw 3 marbles out at random, without replacement. What is the probability that all the marbles are red?

The probability that all the marbles are red is .

What is the probability that exactly two of the marbles are red?
The probability that exactly two of the marbles are red is .

What is the probability that none of the marbles are red?
The probability of picking no red marbles is
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