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Combinatorics
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How many ways an examiner can assign 15 marks to 5 questions?
June 14th, 2022
combinatorics
How many different ways can a group of students be hired to work a survey?
September 12th, 2020
statistics
permutations
combinatorics
In how many ways can $4$ boys and $3$ girls be arranged in a row so that no two girls are together?
June 1st, 2022
combinatorics
In how many ways we can create a positive number less than 1000 and divisible by 5 (no repeating)?
June 3rd, 2022
combinatorics
How to distinguish repetition is allowed and not allowed for combination and permutation?
June 6th, 2022
permutations
discrete-mathematics
combinations
combinatorics
Closed form expression for $\sum_{k=0}^{n}(k^2 + 3k + 2)$
June 6th, 2022
combinatorics
generating-functions
discrete-mathematics
How to calculate the number of non decreasing functions between two finite sets?
June 1st, 2022
permutations
functions
combinatorics
How many ternary strings of length 4 have exactly one 1?
June 5th, 2022
combinatorics
A team won 80% of the games it played 5 more games of which it won 3 and lost 2. Its loss percentage changed to 25% how many games it play overall?
June 6th, 2022
combinatorics
permutations
combinations
percentages
probability
How many different necklaces can be formed with $6$ white and $5$ red beads?
June 6th, 2022
combinatorics
Probability of increasing order of a $3$ rolls of a die.
June 1st, 2022
probability
combinatorics
dice
In how many ways can you arrange all letters in the word MISSISSIPPI so that
October 6th, 2020
combinatorics
Combinatorics (Yahtzee)
June 6th, 2022
combinatorics
Project Euler's Problem Number 88
June 6th, 2022
project-euler
combinatorics
algorithms
computational-complexity
computability
Let A = {1, 2, 3, . . . , 10}, and B = {1, 2, 3, . . . , 7}. How many functions f : A→B satisfy |f (A)| = 4? How many have |f (A)| ≤ 4?
June 1st, 2022
discrete-mathematics
combinatorics
How-many-different-adjacency-matrix-with-N-vertices-and-E-edges-have?
December 14th, 2020
graph-theory
combinatorics
How many 4 digit numbers can be made with exactly 2 different digits
December 4th, 2020
combinatorics
permutations
In how many ways can 7 boys and 7 girls be seated in a circle, such that no two girls are together?
November 2nd, 2020
combinatorics
Probability of getting 4 hearts in 5 cards from very big deck of cards
June 1st, 2022
probability
combinatorics
Distributing distinct apples among 5 people
June 6th, 2022
combinatorics
Show that $(1+x)^n$ = .... Hence deduce that .... = $2^n$
June 6th, 2022
proof-verification
binomial-coefficients
combinations
combinatorics
Proof for Binomial theorem
June 6th, 2022
algebra-precalculus
combinatorics
In a room there are eight lights. Each light can be switched on and off independently of the others. In how many ways can the room be lit with-?
June 6th, 2022
combinatorics
How many nonempty strings with length not exceeding $n$ consist entirely of $1$'s?
June 6th, 2022
combinatorics
Find the number of six-digit numbers that can be formed
June 6th, 2022
combinatorics
arithmetic
Couples sitting at a round table
June 6th, 2022
inclusion-exclusion
combinatorics
discrete-mathematics
Permutation: President and Vice-President
January 14th, 2020
algebra-precalculus
combinatorics
Picking two cards of the same suit
June 6th, 2022
probability
combinatorics
In an election the number of candidates is one more than ...
June 6th, 2022
combinatorics
Finding the rank of the word MOTHER
June 6th, 2022
combinatorics
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