Question:
Write a program to find Permutations in which n people can occupy r seats in a classroom.
Solution:
Write a program to find Permutations in which n people can occupy r seats in a classroom.
Solution:
Showing posts with label Permutations and Combinations. Show all posts
Showing posts with label Permutations and Combinations. Show all posts
Monday, 13 May 2019
Sunday, 7 April 2019
Permutations and Combinations
Permutations and Combinations :
Permutations
1.nPr = n!/(n-r)!
2.nPn = n!
3.nP1 = n
Combinations
1.nCr = n!/(r! (n-r)!)
2.nC1 = n
3.nC0 = 1 = nCn
4.nCr = nCn-r
5.nCr = nPr/r!
Number of diagonals in a geometric figure
of n sides = nC2-n
