import random

score = 0


def deal_hand():
    for _ in xrange(3):
        random.shuffle(deck)
        hand.append(deck.pop())


def check_odds():
    for n in hand:
        if n % 2 == 0:
            return False
    return True


for n in xrange(10000000):
    deck = [_ for _ in range(1, 11)]
    hand = []
    deal_hand()
    if (10 in hand) or check_odds():
        score += 1

probability = (score/10000000.0) * 100
print probability, " %"