Two marbles are drawn in succession from the box containing 10 red, 30 white, 20 blue, and 15 orange marbles. replacement being made after each drawing. Find the probability that is:
(a) both are white
(b) the first is red and the second is white
(c) neither is orange
(d) they are either red or white or both ( red and white )
(e) the second is not blue
(f) the first is orange
(g) at least one is blue
(h) at most one is red
(i) the first is white but the second is not
(j) only one is red