Suppose we draw three balls out of an urn that contains 15 balls numbered 1 to 15. Let X be the largest number drawn. Find the probability function of X.

What I've got:

IDK just something feels wrong. Any help?

Thanks

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- January 31st 2010, 06:11 PMAnonymous1Probability mass function
Suppose we draw three balls out of an urn that contains 15 balls numbered 1 to 15. Let X be the largest number drawn. Find the probability function of X.

What I've got:

IDK just something feels wrong. Any help?

Thanks - January 31st 2010, 08:37 PMmatheagle
I don't get that result.

I would do it via chooses...

and

and

and

From this you can derive , which is three times your answer