Using 2D array in Java get 3 subject mark and give result total student are 10

// Using 2D array in Java get 3 subject mark and give result total student are 10
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package ahsan;
import java.util.Scanner;
public class Ahsan {

    public static void main(String[] args) {
    Scanner obj=new Scanner(System.in);
    int sum=0, per=0;
    int arry [][]= new int [10][3];
    for(int r=0; r<10; r++)
    {
        System.out.print("\t"+(r+1)+" Student :\n");
        for(int c=0; c<3; c++)
        {
             System.out.print("\t"+(c+1)+" Subject Marks :");
             arry[r][c]=obj.nextInt();
             sum+=arry[r][c];
        }
         System.out.println("Total is :"+sum);
        per=sum*100/300;
        System.out.println("Percenstage is :"+per );
        if (per >=80)
        {System.out.println(" A Grade");}
        else if (per >=65)
        {System.out.println("B Grade");}
        else if (per >= 50)
        {System.out.println("C Grade");}
        else if (per >=40)
        {System.out.println("D Grade");}
        else
        {System.out.println("Fail");}
    sum=0;
    per=0;
    }
    }
}

Output of this Program this is continue Run 10 times.