Duration: 13:17
Posted: Oct 14, 2023
Posted: Oct 14, 2023
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People also ask
What is the formula for the number of permutations?
The number of permutations of n objects taken r at a time is determined by the following formula: P(n,r)=n! (n−r)!
What is the formula for combination and permutation?
The formula for permutations is: nPr = n!/(n-r)! The formula for combinations is: nCr = n!/[r! (n-r)!]
How many combinations of 3 with 4 items are there?
There are 4 * 3 * 2 = 24 combinations if repetition is not allowed.
How to solve 5C3?
1 Answer
1
nCr=n! r! (n−r)!
2
5C3=5! 3! (5−3)!
3
=5! 3! ×2!