Q4 20 points A bag contains 7 red and 3 blue marbles You dra

Q.4 (20 points) A bag contains 7 red and 3 blue marbles. You draw three marbles from this bag without replacement. Let X be the number of blue marbles you get. a) Is X a discrete or a continuous random variable? b) Determine the probability distribution function f(x) and the cumulative distribution function F(x) for the random variable X. Using F(x) find P(X