Mathematics
Reputation
1,803
Top tag
Next privilege 2,000 Rep.
 Apr15 awarded Popular Question Feb20 awarded Notable Question Jan10 awarded Yearling Dec14 awarded Popular Question Dec1 awarded Nice Question Sep16 awarded Popular Question Jul2 awarded Curious Jul2 awarded Inquisitive May27 awarded Notable Question May15 awarded Popular Question Apr9 awarded Popular Question Mar19 awarded Popular Question Jan10 awarded Yearling Nov10 awarded Popular Question Oct24 comment What is the expected number of rounds that everyone get back their own ball? Ya, that's what i have thought but the $x$ can be infinity right? And if $x$ is infinity, i think the expression of the expection is kind of weird and i am not sure how the expression would be like Oct24 comment What is the expected number of rounds that everyone get back their own ball? Sorry, when i get deeper thought to the solution i get a little bit confused. Could you explain more about the part that once you find expected value of n people is 1 then you claim the expected round is n. Can it be Written in terms of the Random Variable? The reason i get confused is when finding the expected values of the number of rounds, it seems there could be infinite many so i dont quite get although it sounds true. Oct21 accepted What is the expected number of rounds that everyone get back their own ball? Oct21 asked What is the expected number of rounds that everyone get back their own ball? Oct21 accepted If $G$ is a finite group, then $\operatorname{ord}S(a)=\operatorname{ord}(G)/\operatorname{Ord}(C(a))$ Oct15 asked If $G$ is a finite group, then $\operatorname{ord}S(a)=\operatorname{ord}(G)/\operatorname{Ord}(C(a))$