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seen Feb 10 '13 at 9:42

Feb
10
revised Differential equation variation of parametres
deleted 177 characters in body
Feb
10
comment marriage probability problem
What did you get? I want to see how different our answers are. Thanks
Feb
10
comment marriage probability problem
hmm, but I don't have the exact number for seats. I'm inserting B first and then inserting D into holes between 2n-2 and 2n-1 people. Well.. then what did you get?
Feb
10
comment marriage probability problem
If A and B already sit next to each other, then treat A and B as an entity. Insert D into 2n -1 places, the probability that D is next to C is 2 / 2n-1... What did you get?
Feb
10
comment marriage probability problem
sorry, is it 2/ (2n-1)*n ? I used conditional probability
Feb
10
comment marriage probability problem
I got 1/n and 2/ 2n-1. is that correct?
Feb
10
asked marriage probability problem
Feb
10
comment expectation and variance problem
hey, is E[x1] = 1/n and E[x1 x2] = 2/ 2n-1?
Feb
10
comment expectation and variance problem
How can I calculate P[x1 x2] and P[x1]?
Feb
10
asked Expectation probability question
Feb
9
comment Differential equation variation of parametres
also, if I find two special solutions to the homogeneous solution, how can I get general solution to homogeneous one? Can I simply add c1, c2?
Feb
9
comment Differential equation variation of parametres
well, then n = -2 or n = -4, why is n = 2 also a solution?
Feb
9
comment Differential equation variation of parametres
That's the problem... I don't know what value of n to try
Feb
9
comment Differential equation variation of parametres
how can I find n?
Feb
9
revised Differential equation variation of parametres
added 2 characters in body
Feb
9
comment Differential equation variation of parametres
Yes, I missed that, edited
Feb
9
asked Differential equation variation of parametres
Feb
9
asked expectation and variance problem
Feb
3
asked hard parametrization problem
Jan
18
awarded  Disciplined