What is Combination(nCr) ?
The Combination Calculator(nCr) tool enables you to calculate the factorial of a chosen number.
In maths, nCr is used to find out the number of ways to choose r objects (subset) from n number of objects (larger set). 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,K or J,K. so it means that I have 3 ways to choose.
In that case, n = 3(larger set) and r = 2(subset). The combinations is: 3C2, which is 3.
The nCr Formula or Combination FormulaYou can use the nCr formula to find the nCr value:
n! / r! × (n-r)!
4 choose 2 = 4C2=
4! / 2! × (4-2)!= 6
To know how to find nCr? Please use our nCr calculator for free.