## anonymous 3 years ago What is the summation of:

1. anonymous

|dw:1357507840261:dw|

2. anonymous

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

3. anonymous

this is the real problem

4. anonymous

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

5. anonymous

i want to find pi0

6. anonymous

@satellite73 the book says something about hypergeometric distribuction

7. anonymous

actually (2n,n) is just pi0

8. anonymous

i am afraid i do not know the meaning of $$\pi_0$$

9. anonymous

it is just a probability

10. anonymous

|dw:1357508663436:dw|

11. anonymous

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

12. anonymous

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

13. anonymous

i guess i am useless here sorry

14. anonymous

|dw:1357508806154:dw|

15. anonymous

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