#Student takes certain amount of courses during the academic year. 
#Write a program that reads number of courses and final grade for 
#each course, and finds the average final grade for the academic 
#year. Use TOP-DOWN design - use functions
#function average that has one parameter - numbers of courses
#function returns average grade
#write  main to test your function 

def average(num_courses):
	sum=0
	counter=0
	while(counter<num_courses):
		grade=int(input("enter grade "))
		sum=sum+grade
		counter=counter+1
	return sum/num_courses
def main():
	num_students=int(input("how many students "))
	counter=0
	while(counter<num_students):
		num_courses=int(input("how many courses you are taking "))
		print("average course grade is", average(num_courses))
		counter=counter+1
main()