#write a function count_pass that has one parameter - list of 
#grades
#function returns the number of students who passed the course, and 
#the average passing grade

#write a function random_list that has 3 parameters: size, min, max
#size-number of elements in the list, min - minimal value, max - 
#maximal value. Function generates and returns the one dimensional 
#list of size integers, each integer between min and max

#write main to generate the list, and test function count_pass

import random
def random_list(size, min, max):
	my_list=[]
	for i in range(size):
		my_list.append(random.randint(min, max))
	return my_list

def count_pass(my_list):
	size=len(my_list)
	count=0
	sum=0
	for i in range(size):
		if(my_list[i]>=60):
			count+=1
			sum+=my_list[i]
	if(count>0):
		return count, sum/count
	else:
		return count, -1
def main():
	size=random.randint(5,15)
	print("size is", size)
	grades=random_list(size, 0, 100)
	print("list of grades is")
	print(grades)
	count, ave=count_pass(grades)
	if(count==0):
		print("nobody passed the course")
	else:
		print("count", count, "average", ave)
main()