Stack Exchange

N. F. Taussig

top accounts reputation activity subscriptions
Top Questions
Top Answers
118
There are 4 cups of liquid. Three are water and one is poison. If you were to drink 3 of the 4 cups, what is the probability of being poisoned?
math.stackexchange.com

67
Count number of increasing functions, nondecreasing functions $f: \{1, 2, 3, \ldots, n\} \to \{1, 2, 3, \ldots, m\}$, with $m \geq n$.
math.stackexchange.com

59
Easy way to compute logarithms without a calculator?
math.stackexchange.com

52
Explanation circular permutation
math.stackexchange.com

50
Why rationalize the denominator?
math.stackexchange.com

37
Probability that randomly picking $4$ out of $90$ numbers yields an ascending sequence?
math.stackexchange.com

27
Prove that the power set of an $n$-element set contains $2^n$ elements
math.stackexchange.com

23
Probability of $2$ people being together out of a group of $4$.
math.stackexchange.com

19
Are all functions that have an inverse bijective functions?
math.stackexchange.com

18
Why is $\sqrt{x}$ a function?
math.stackexchange.com

18
How many Arrangement of "AMAZED" letter E Positioned between two A's (Not necessarily Flanked)
math.stackexchange.com

17
Probabilities : A red die, a blue die, and a yellow die (all six-sided) are rolled.
math.stackexchange.com

17
How many non-negative integer solutions does the equation $3x + y + z = 24$ have?
math.stackexchange.com

16
Find number of common divisors of 463050 and 2425500
math.stackexchange.com

15
Probability of deck of cards such that each person receives one ace
math.stackexchange.com

14
In how many ways the sum of 5 thrown dice is 25?
math.stackexchange.com

14
Arrangements of a,a,a,b,b,b,c,c,c in which no three consecutive letters are the same
math.stackexchange.com

13
Why my process is wrong:-How many ways are there to choose $5$ questions from three sets of $4$, with at least one from each set?
math.stackexchange.com

13
Ways to arrange the letters in **BOOKKEEPER** if vowels must appear in alphabetical order?
math.stackexchange.com

13
Probability of collecting all 5 buying 7 chocolates
math.stackexchange.com

13
Find area of the triangle ABC, given the coordinates of vertices in plane
math.stackexchange.com

12
How many positive integers less than 1,000,000 have the sum of their digits equal to 19?
math.stackexchange.com

11
Rolling 3 dice and getting exactly 2 to be of the same number
math.stackexchange.com

11
How is the formula for counting multisets derived?
math.stackexchange.com

11
In how many different ways can you split $10$ people into two groups of $5$ people?
math.stackexchange.com

11
What is the number of arrangements in the word "DAUGHTER" where vowels are never together?
math.stackexchange.com

10
If the sum to 4 terms of a geometric progression is 15 and the sum to infinity is 16 find the possible values of the common ratio.
math.stackexchange.com

10
What is the concept behind this derangement formula?
math.stackexchange.com

10
Seven coins are flipped. Find the probability that three land on one side, four on the other.
math.stackexchange.com

10
Represent $1^5+2^4+3^3+4^2+5^1$ in sum notation
math.stackexchange.com

1 2 3 4 5 6