#write a program that first randomly generates the number of students in the 
#class. The class size will be between 15 and 24

#Then for each student the program randomly generates final grade. The 
#program finds the number of students who failed the class (grade below 60)
#the number of students who got A (grade 95 - 100)
#and their averages

import random
size_class=random.randint(15,24)
print("size of the class is",size_class)
cF=0
cA=0
totalF=0
totalA=0
for i in range(size_class):
	#grade=random.randint(0,100)
	#grade=random.randint(60,100) # this will check special case nobody failed
	grade=random.randint(0,94) #this will check special case nobody got A
	print(grade)
	if(grade<60):
		cF=cF+1
		totalF=totalF+grade
	elif(grade>=95):
		cA=cA+1
		totalA=totalA+grade
if(cF>0):
	print(cF, "failed")
	print("failing average is",totalF/cF)
else:
	print("nobody failed")

if(cA>0):
	print(cA,"got A")
	print("their average",totalA/cA)
else:
	print("nobody got A")

#Testing the program
#the random data that was generated was: size of the class 18
#and grades:  96 18 15 2 69 77 22 13 48 51 93 90 88 5 94 32 39 98 
#the A grades are: 96 and 98 and their average (96+98)/2=97.0 and that matches the 
#output
#Failing grades are: 18 15 2 22 13 48 51 5 32 39
#there are 10 failing grades
#average (18+ 15+ 2+ 22+ 13+ 48+ 51+ 5+ 32+ 39)/10= 24.5
#it matches the out my program printed

#based on this the program runs correctly

#if we want to check special cases: nobody failed, nobody got A

#in order to do that we make change in the range of the grade