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  1. Prepare
  2. Artificial Intelligence
  3. Probability & Statistics - Foundations
  4. Day 2: Basic Probability Puzzles #4
  5. Discussions

Day 2: Basic Probability Puzzles #4

  • jmbirk
     + 0 comments

    I tried to do it both pythonically and with clear decipherability from the problem description. Pythonically meant, in this context, making good use of the unpacking operators.

    from math import gcd
from itertools import product, combinations

b1 = (*'r'*4, *'b'*5)
b2 = (*'r'*3, *'b'*7)
total = [(*a, *b) for a, b in product(combinations(b1, 1), combinations(b2, 2))]
n = len([_ for _ in total if _.count('b') == 2])
d = len(total)
factor = gcd(n, d)
print(n//factor, '/', d//factor, sep='')