Stav Alfi's user avatar
Stav Alfi's user avatar
Stav Alfi's user avatar
Stav Alfi
  • Member for 6 years, 10 months
  • Last seen more than a month ago
11 votes
3 answers
13k views

How many permutations of $\{1,2,3,...,n\}$ there are with no 2 consecutive numbers?

8 votes
7 answers
1k views

What is the right way to calculate a power?

6 votes
1 answer
1k views

Find the number of ordered pairs (A,B) such that A∩B≠∅

4 votes
1 answer
9k views

$x+\ln(x)=0$, what is $x$?

2 votes
1 answer
979 views

How to find the base of union of 2 subspaces

2 votes
1 answer
63 views

linear algebra, basic questions

2 votes
1 answer
180 views

Determinant of a matrix $P$ such that $AP=BP$.

2 votes
4 answers
92 views

How many solution for the equation $x+y=m+6$

2 votes
2 answers
100 views

What is the chance that $k$ people will be sitting between 2 specific people?

2 votes
3 answers
251 views

Calculating wrong a Binomial distribution

2 votes
2 answers
198 views

What does is mean $Y=\min \{X_1,X_2\}$?

1 vote
1 answer
55 views

What is the probability that 3 will be a temporary maximum?

1 vote
2 answers
106 views

Probability to draw a group of balls which contains a specific ball

1 vote
2 answers
66 views

What independent events actually means?

1 vote
1 answer
77 views

$P(X+Y=k | Y=y) $ to $ P(X=k-y)$

1 vote
1 answer
58 views

Defining events

1 vote
1 answer
74 views

Clue for exercise: What percent of the days are cloudy?

1 vote
1 answer
26 views

When integral is diverging?

1 vote
5 answers
348 views

How many ways can we put $n+2$ different balls into $n$ different cells?

1 vote
0 answers
47 views

how to solve y^2<x^2 y^2>x^2

1 vote
1 answer
65 views

math theory- primes problem

1 vote
1 answer
62 views

Greedy coloring of uniform hyperhraphs

1 vote
1 answer
34 views

Let $X$ be the size of $A$. How $X$ is distributed?

0 votes
1 answer
3k views

Limit of (cot x)/x when x->infinity

0 votes
1 answer
70 views

What do I gain if a number is Quadratic residues?

0 votes
1 answer
74 views

Quadratic residues and euler equation

0 votes
2 answers
135 views

How many ways can we put $m$ people in the circle with $m+r$ identical seats?

0 votes
1 answer
88 views

developing to maclaurin Series $f(x)=\frac{2x+3}{x^2 -4x+5}$ on $x=2$

0 votes
2 answers
2k views

Find the probability that $A$ is a subset of $B$

0 votes
1 answer
84 views

Find the probability distribution of $Z = X + Y$