A set of 10 cards consist of 5 red cards and 5 black cards. The cards are shuffled thoroughly and you turn cards over, one at a time, beginning with the top card. Let X be the number of cards you turn over until you observe the first red card. The probability that X is greater than 2 is
(a) 0.125
(b) 0.5
(c) 0.25
(d) 0.945
(e) None of (a) to (d).