A.py - Average of Three Numbers

Write a Python program that ask user to enter three interger numbers a, b, c.
Your program should calculates the average of a, b, c and display the result on the screen, as shown in the examples below.

Hint: To enter an integer number, use a = int (input("Enter number a: "))

Example 1:

Enter number a: 1
Enter number b: 5
Enter number c: 9
The average of three numbers is 5

Example 2:

Enter number a: 10
Enter number b: 20
Enter number c: 30
The average of three numbers is 20