A bag contains 9 red marbles, 9 white marbles, and 5 blue marbles. You draw 3 marbles out at random, without replacement. Give all answers as a decimal rounded to four places. a) What is the probability that all the marbles are red? The probability that all the marbles are red is . b) What is the probability that exactly two of the marbles are red? The probability that exactly two of the marbles are red is . c) What is the probability that none of the marbles are red? The probability of picking no red marbles is .