import java.io.*;


public class Test1{

 public static void main(String args[]){
    String ans1="a",ans2="a",ans3="a",ans4="a",ans5="a";
    double totPercentage = 0.00;
    double avgPercentage = 0.00;



    System.out.println("Enter No. Of Students");
    try{
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        String s = br.readLine();
        int n = Integer.parseInt(s);


        for(int i=1;i<=n;i++){
            int count =0;


            System.out.println("Give the answers for student "+i);

            System.out.println("First Question select choice : A B C D");
            String ansr1 = br.readLine();
            if(ansr1.equalsIgnoreCase(ans1))
                count=count+1;
            System.out.println("Second Question select choice : A B C D");
            String ansr2 = br.readLine();
            if(ansr2.equalsIgnoreCase(ans2))
                count=count+1;
            System.out.println("Third Question select choice : A B C D");
            String ansr3 = br.readLine();
            if(ansr3.equalsIgnoreCase(ans3))
                count=count+1;
            System.out.println("Fourth Question select choice : A B C D");
            String ansr4 = br.readLine();
            if(ansr4.equalsIgnoreCase(ans4))
                count=count+1;
            System.out.println("Fifth Question select choice : A B C D");
            String ansr5 = br.readLine();
            if(ansr5.equalsIgnoreCase(ans5))
                count=count+1;


            double percentage = (count/5.0)*100;
            System.out.println("Percentage : "+percentage+"%");

            totPercentage =totPercentage+percentage;

        }

        avgPercentage= totPercentage/n;
        System.out.println("Class Avg : "+avgPercentage+"%");

    }
    catch(Exception e){
        e.printStackTrace();
    }
 }

}