Bojan Serafimov
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 Jan 10 awarded Yearling Jan 11 awarded Yearling Aug 5 accepted $P(X \ge 450)$ in Possion distribution Aug 5 asked $P(X \ge 450)$ in Possion distribution Aug 4 comment 1000 nuts in 500 cakes, random variable X = the number of nuts in a random cake I think (b) is closer to the problem description, so let's solve (b). Aug 4 revised 1000 nuts in 500 cakes, random variable X = the number of nuts in a random cake deleted 9 characters in body Aug 4 asked 1000 nuts in 500 cakes, random variable X = the number of nuts in a random cake Jan 14 comment having trouble with this well known fact $ab | a^2 + b^2 +1 =>a^2 + b^2 +1 = 3ab$ no it worked out by itself, i just waited a minute or two, probably because the latex was compiling, or because I use and experimental version of Firefox. I registered on the site, its very helpful, just what I was looking for. Thank you very much. Jan 14 comment Trying to find $\sum\limits_{k=0}^n k \binom{n}{k}$ lol genious :DD Jan 14 accepted Trying to find $\sum\limits_{k=0}^n k \binom{n}{k}$ Jan 14 comment Trying to find $\sum\limits_{k=0}^n k \binom{n}{k}$ Thank you, you should have put that as an answer Jan 14 asked Trying to find $\sum\limits_{k=0}^n k \binom{n}{k}$ Jan 14 accepted 'skew' in geometry Jan 14 asked 'skew' in geometry Jan 13 comment Why is antisymmetry necessary for comparison sort? I think sorting would go fine, but data structures like set and map wont work, because without antisymmetry, you cant find the element in the set, it could be anywhere. Jan 13 comment Why is antisymmetry necessary for comparison sort? This definition of antisymmetric refers to numbers $x, y$, not objects Jan 13 comment Why is antisymmetry necessary for comparison sort? If I'm at least as old as you, and you're at least as old as me, we are the same age. Jan 13 comment Why is antisymmetry necessary for comparison sort? Your relation "is at least as old as" is antisymmetric. Jan 13 answered what is the ratio of their speed? Jan 13 answered Does a graph with $0$ vertices count as simple?