Five cards are drawn at random from an ordinary deck of 52 cards. In how many ways is it possible to draw four black cards and one red card?
+526 No. of black cards = No. of red cards = 26
4 black cards can be drawn in = 26C4 ways
1 red card card can be drawn in = 26C1 ways
No. of ways = 26C4×26C1
