How can i do this in python?

Question

I would like to know how I can make the probability of a card coming out, for example: I have a letter A, letter B and letter C but letter B is more "rare" and it is harder to pick up like the others..and I want to do this in python..machines give me 1 of 3, and B has to be the hardest if you catch it..I hope you will help me in this and thanks for the attention ^^

Answer 1

Similar to Jay Matthews :
from random import randint

x=randint(1,101)
print(x)
if x<=45:
print("A")
elif 46<=x<=90:
print("C")
else:
print("B")

Answer 2

not work :'(

Answer 3

x=randint(1,101)
print(x)
if x<=45:
print("A")
elif 46<=x<=90:
print("C")
else:
print("B")