[Eranga]

Here is much simpler way I can come across with your question.

Code:

1. Initialize Total_Std_Count = 0
2. Initialize Total_Female_Std = 0
3. Initialize Total_Age = 0
4. Initialize Avg = 0

5. OPEN STUDENT_FILE

6. READ a Record (NATIONALITY, SUBJECT, AGE, GENDER)

7. LOOP UNTIL end of file

8. IF every "NATIONALITY" matches "Indonesia" AND
        every "SUBJECT" matches "Multimedia"
        THEN
             Add 1 to Total_Std_Count

9. ELSE
      DISPLAY "NO_STD_RECORD_FOUND"

10.IF every Gender = Female
        THEN Add 1 to Total_Female_Std

11.ELSE
      DISPLAY "NO_RECORD_FOUND" 
             

12.IF every "AGE" is greater than zero
      Then
          Add AGE to Total_Age

13.ELSE 
      DISPLAY "Invalid age"

14.DISPLAY Total_Std_Count

15.DISPLAY Total_Female_Std

16.CALCULATE AVG as
        Total_Age devide by Total_Std_Count

17.DISPLAY AVG