Get input of 3 marks and show percent with pass and fail - problem 2/chapter 6

 MY WAY:

a = int(input("enter the marks of chemistry: "))
b = int(input("enter the marks of physics: "))
c = int(input("enter the marks of biology: "))

if((a+b+c/300)<100):
    print("you are fail with ", ((a+b+c)/300)*100" percent only")
else:
    print("you are pass with ", ((a+b+c)/300)*100" percent")


Code with harry way:

This way don't show the percentage to the user.
But it doesn't include maths.

sub1 = int(input("Enter first subject marks\n"))
sub2 = int(input("Enter second subject marks\n"))
sub3 = int(input("Enter third subject marks\n"))

if(sub1<33 or sub2<33 or sub3<33):
    print("You are fail because you have less than 33% in one of the subjects")
elif(sub1+sub2+sub3)/3 < 40:
    print("You are fail due to total percentage less than 40")
else:
    print("Congatulations! You passed the exam")





PROBLEM 6:

marks = int(input("enter your marks: "))
if(marks > 100):
    print("you entered wrong marks")
elif(marks >= 90):
    print("your grade is- Ex")
elif(marks >= 80):
    print("your grade is- A")
elif(marks >=70):
    print("your grade is- B")
elif(marks >=60):
    print("your grade is- C")
elif(marks >= 50):
    print("your grade is- E")

else:
    print("you are fail")



PROBLEM 7:

post = input("write the post: ")

if("devil" in post):
    print("\'devil\' is in the post")
else:
    print("no")

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