What is permutation(nPr)?
In maths, nPr is used to find out the number of ways to choose r objects (subset) from n number of objects (larger set), which the order of choosing the objects should also be considered. For example, if i have 3 cards J,Q,K. I want to choose 2 out of them. How will i choose? I can either choose J,Q or Q,J or Q,K or K,Q or J,K or K,J. so it means that I have 6 ways to choose.
In that case, n = 3(larger set) and r = 2(subset). The combinations with order is: 3P2, which is 6.
The nPr Formula or Permutation FormulaYou can use the nPr formula to find the nPr value:
n! / (n-r)!
4! / (4-2)!= 12
To know how to find nPr? Please use our nPr calculator for free.