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May
24
awarded  Popular Question
May
1
awarded  Yearling
Feb
26
comment Poker dice probability of rolling 2 pairs
thank you!!!!!!!
Feb
26
asked Poker dice probability of rolling 2 pairs
Jan
24
awarded  Self-Learner
Jan
18
awarded  Nice Question
Oct
6
asked The quantile function $F^{-1}(p) = c$ for all $p$ in the interval $(p_0, p_1)$ has the condition that $Pr(X=c) = p_1 - p_0$
Sep
23
comment Show that every proper subgroup of this group is finite.
@Denis I see what you mean, in that case then I don't quite know where to start.
Sep
23
asked Show that every proper subgroup of this group is finite.
Sep
17
awarded  Notable Question
Sep
2
accepted Show that the collection of all subsets of a finite sample space satisfies the 3 conditions to be called a collection of events.
Sep
2
comment Show that the collection of all subsets of a finite sample space satisfies the 3 conditions to be called a collection of events.
I think I'm confused with the difference of $S$ and the collection of all subsets of $S$. Say if $S = \{1,2\}$, then the collection of all subsets of $S$ will be $\{\emptyset\}, \{1\}, \{2\}, \{1,2\}$ right? If I let $A = \{1\}$, then what does $A^c$ look like? $A^c=\{2\}$ or $A^c=\{\emptyset\}, \{2\}, \{1,2\}$? @Dilip Sarwate as well. Thanks you guys in advance!
Sep
2
asked Show that the collection of all subsets of a finite sample space satisfies the 3 conditions to be called a collection of events.
Aug
13
accepted Given $P$ idempotent, show that $I-P$ is idempotent.
Aug
12
comment Given $P$ idempotent, show that $I-P$ is idempotent.
thanks a lot!!!!
Aug
12
comment Given $P$ idempotent, show that $I-P$ is idempotent.
thanks! after a long summer I forgot whether if matrices could be multiplied out or not...
Aug
12
asked Given $P$ idempotent, show that $I-P$ is idempotent.
Jul
2
awarded  Curious
May
13
comment Do there exist $a_k$ and $b_k$ so the equation $\sum\limits_{k=1}^{n} (a_k \sin(kx) + b_k \cos(kx)) = 0$ has no roots?
thanks @Goos and @sos440!!!
May
13
accepted Do there exist $a_k$ and $b_k$ so the equation $\sum\limits_{k=1}^{n} (a_k \sin(kx) + b_k \cos(kx)) = 0$ has no roots?