Combinations

Combination

// Java program To calculate
// The Value Of nCr
class GFG {
 
static int nCr(int n, int r)
{
    return fact(n) / (fact(r) *
                  fact(n - r));
}
 
// Returns factorial of n
static int fact(int n)
{
    int res = 1;
    for (int i = 2; i <= n; i++)
        res = res * i;
    return res;
}
 
// Driver code
public static void main(String[] args)
{
    int n = 5, r = 3;
    System.out.println(nCr(n, r));
}
}
 
// This code is Contributed by
// Smitha Dinesh Semwal.

Source: geeksforgeeks.org

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