from random import randint

def chance(probability):
    # Make this

def test_chance(probability):
    total_rolls = 10000
    positives = 0
    for roll in range(1, total_rolls):
        if chance(probability):
            positives += 1
    print "Achieved %d frequency (%d/%d) with probability of %d" % ((positives / float(total_rolls))*100, positives, total_rolls, probability)

test_chance(50) # Should output frequency close to 50
test_chance(25) # Should output frequency close to 25
test_chance(11) # Should output frequency close to 11