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DNB‭

Profile Activity

A quiet enigma. We don't know anything about DNB‭ yet.

Posts

66%

+2 −0

Q&A How can I deduce which operation removes redundacies?

3 answers · last activity 15 days ago by DNB‭

Question probability

66%

+2 −0

Q&A $\sum_{k=0}^{n} \binom{n}{k}=2^{n} \overset{?}{\iff} \sum_{k=0}^{n} \binom{2n+1}{k}=2^{2n}$

1 answer · last activity 7 days ago by DNB‭

Question combinatorics

60%

+1 −0

Meta Why isn't \hline rendering here, when it does on Stack Exchange? [duplicate]

0 answers · last activity about 2 months ago by Monica Cellio‭

Question bug

50%

+2 −2

Q&A What story and one-digit Natural Numbers explain Bayes' Theorem chart most simply?

0 answers · last activity 5 months ago by Moshi ‭

Question probability

50%

+0 −0

Q&A "A occurred" vs. "something must happen"

1 answer · last activity 15 days ago by DNB‭

Question probability

50%

+0 −0

Q&A How does the change of variable $\color{red}{r↦n−r}$ transmogrify $\sum\limits_{r=0}^n2^{n-r}\binom{n+r}{n}=2^{2n}$ into $\sum\limits_{k=0}^{n} \frac{\binom{2n-k}{n}}{2^{2n-k}}=1$?

1 answer · last activity 12 days ago by Moshi ‭

Question summation

50%

+0 −0

Q&A If Alice must've have classes on at least 2 days, why do you need the intersection of 3 $A_i^C$'s?

0 answers · last activity about 15 hours ago by DNB‭

Question probability

40%

+0 −1

Meta What story and TWO-digit Natural Numbers best fit Bayes' Theorem chart?

2 answers · last activity 17 days ago by Monica Cellio‭

Question discussion

40%

+0 −1

Q&A Why $\color{red}{k\dbinom{k}{1}} \neq$ "first choose the k team members and then choose one of time to be captain"?

1 answer · last activity 15 days ago by r~~‭

Question probability

40%

+0 −1

Q&A If A & B are joint, why can Arby recoup some of his loss only when $P_{Arby}(A \cup B) < P_{Arby}(A) + P_{Arby}(B)$? But not $P_{Arby}(A \cup B) > P_{Arby}(A) + P_{Arby}(B)$?

0 answers · last activity 11 days ago by DNB‭

Question probability

33%

+0 −2

Q&A If k = 1, why $n(n-1) \dots \color{red}{(n-k+1)} = n$?

1 answer · last activity 15 days ago by DNB‭

Question probability

33%

+0 −2

Q&A Out of 4 people, why does ways to choose a 2-person committee overcount by 2 the ways to divide the 4 into 2 teams of 2?

0 answers · last activity 15 days ago by DNB‭

Question probability

33%

+0 −2

Q&A What's the bijection between Stars and Bars and Integer Solutions to an Equality?

0 answers · last activity 15 days ago by DNB‭

Question combinatorics

33%

+0 −2

Q&A You're sampling k people from a population of size n one at a time, with replacement and with equal probabilities. Order or not?

0 answers · last activity 15 days ago by DNB‭

Question probability

33%

+0 −2

Q&A Why isn't the probability of being void in 3 specific suits $\frac{1/13}{\dbinom{52}{13}}$?

0 answers · last activity 11 days ago by DNB‭

Question probability

Reputation		-34
Number of top-level posts		22
Number of answers		0
Sum of received votes (up minus down)		-28
Number of edits made		30

Earned Abilities

Statistics

Posts
Count		22
Questions		22
Answers		0
Articles		0

Votes cast
Count		3

Flags raised
Count		0