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|dw:1357507840261:dw|

\[\Large \left(\begin{matrix}n \\ i\end{matrix}\right)^2\]

this is the real problem

pretty sure it is \(\dbinom{2n}{n}\) but i can't off the top of my head remember why

i want to find pi0

@satellite73 the book says something about hypergeometric distribuction

actually (2n,n) is just pi0

i am afraid i do not know the meaning of \(\pi_0\)

it is just a probability

|dw:1357508663436:dw|

oh i see you are supposed to prove that it is a probability by showing the sum is one
hmmm

no i have to find pi0,i know it's a probability

i guess i am useless here sorry

|dw:1357508806154:dw|

acctualy you are rigth were the hell this (2n,n) come from?