SOLUTION: Hi, I have no idea where to even start.
You own 10 CDs. You want to randomly arrange 5 of them in a CD rack. What is the probability that the rack ends up in alphabetical order?
Question 1033961: Hi, I have no idea where to even start.
You own 10 CDs. You want to randomly arrange 5 of them in a CD rack. What is the probability that the rack ends up in alphabetical order? Be sure to leave your answer as a fraction in order to earn credit.
There is only 1 way they can be arranged in alphabetical order.
There are 5P5 = 5! = 5*4*3*2*1 = 120 ways they can be arranged
in different orders.
That's 1 way out of 120, or a probability of .
Edwin