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Permutations
New post in Permutations
Probability question help (Check my answers please) Q. selection ordered pairs nPr, nCr
September 30th, 2020
combinatorics
probability
combinations
permutations
how to make pairs from odd number of people one may be alone?
August 1st, 2022
permutations
combinatorics
combinations
Three persons entering a railway carriage where there are 5 vacant seats. In how many ways can they seat themselves?
August 1st, 2022
permutations
combinatorics
How many ways are there to seat six people around a circular table
August 1st, 2022
combinations
permutations
discrete-mathematics
combinatorics
How many 2-digit numbers can be formed from even-numbered digits if the repetition of the digit is not allowed?
April 8th, 2021
combinations
permutations
algebra-precalculus
How many permutations with this set of rows and columns?
January 26th, 2020
combinatorics
permutations
Generate number for 49/6 lottery
February 26th, 2020
combinatorics
permutations
2 Problems on Palindrome of Five Letters: A Letter appears more than twice and no letter does so.
August 1st, 2022
permutations
combinatorics
Determine the number of six-digit integers (no leading zeros) in which no digit may be repeated and divisible by 4?
August 1st, 2022
permutations
combinatorics
How many ways are there to encode the 26-letter English Alphabet into 8-bit binary words?
August 1st, 2022
permutations
combinatorics
Confusing combination-permutations question
April 22nd, 2020
permutations
Six Unique numbers which generate unique sum during addition
September 27th, 2020
number-theory
prime-numbers
permutations
combinatorics
How do I do cycle notation?
August 1st, 2022
permutations
symmetric-groups
Inviting friends to dinner (combination/permutation)
January 29th, 2020
combinatorics
permutations
Combinations of integers
August 1st, 2022
combinations
combinatorics
permutations
How can I calculate the number of combinations of characters?
October 29th, 2020
combinations
factorial
permutations
In how many ways can we choose 5 balls from the box so that we have at least one blue ball?
August 1st, 2022
permutations
combinatorics
Total number of ways to color a regular graph.
March 27th, 2022
permutations
graph-theory
coloring
In how many subsets of {1,2,3 ... 9,10} there are odd number of objects from {1,2,3,4,5} and even number of objects from {6,7,8,9,10}?
August 1st, 2022
permutations
Permuation & combination on finding number of ways lid can be wrongly placed
August 1st, 2022
probability
permutations
combinations
Coloring vertices of a square
August 1st, 2022
permutations
Find the number of $4$-digit numbers that can be formed using $1,2,3,4,5$ if no digit is repeated. How many of these will be even?
August 1st, 2022
permutations
Odd Permutations
August 1st, 2022
abstract-algebra
group-theory
permutations
What is the meaning of ${}^n C_k \times {}^n P_k$?
August 1st, 2022
algorithms
combinations
permutations
combinatorics
Problem finding the number of r-element multi-subsets of the multi-set $M=\{ a_{1},a_{2},...,a_{n},m.b \} $
August 1st, 2022
combinatorics
combinations
permutations
Permutation question in discrete mathematics. At least 1 out 3 members (P) from a total of 10 members
August 1st, 2022
discrete-mathematics
permutations
Painting parallelopiped with 6 different color
October 14th, 2020
permutations
Arrangement of 5 letter words
August 1st, 2022
permutations
How many different ways can a student check off one answer to each question?
June 20th, 2020
permutations
probability
combinatorics
conditional-probability
making necklaces with beads problem
August 1st, 2022
permutations
discrete-mathematics
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