Question

Please help me in doing this program​

Answer 1

Answer:

Explanation:

In this Question, You Have to Calculate factorial three times. So, It's easy to make a function for factorial and call this function in the formula.

I hope You Understand :-)

Answer 2

Answer:

import java.util.*;

public class Main

{    

public static void main(String[] args) {

    Scanner sc=new Scanner(System.in);

    int n=sc.nextInt();

    int r=sc.nextInt();

    int nfact=afact(n);

     int rfact=afact(r);

     int nmr=afact(n-r);

     

     int fact= nfact/(rfact*nmr);

   

 System.out.println(fact);

}

public static int afact(int a)

{  int fact=1;

for( int i=1;i<=a;i++)

{

    fact=fact*i;

}

return fact;

   

}

}

Explanation:

it is a java program