How to calculate joint distributions?

[Syringer]

I don't understand the book's explanation of how it works..here's the question:

An urn contanis p black balls, q white balls, r red balls, n balls are chosen..find the joint distribution of the numbers of black, white, and red balls in the sample.

 

[Armitage]

Who paid for the doobie? He gets the first drag.

 

[Syringer]

?

 

[dym]

multivariable probability...
integral(integral(integral(f(p,q,r),p),q),r)

you need the distribution of each variable or sth similar.

 

[olds]

One for you, one for the spider

 

[His Lord Uberdude]

4
BTW, spider.

 

[MercenaryForHire]

Originally posted by: oldsmoboat
One for you, one for the spider

And always to the left.

- M4H

 

[Kyteland]

http://mathworld.wolfram.com/J...tributionFunction.html