There are 7 red cups and 5 blue cups on a shelf. If 4 cups are selected at random from the shelf, what is the probability that all 4 cups selected are red cups?
Select:
A) 1/99 B) 5/99 C) 7/99 D) 11/99 E) 17/99
The number of ways of choosing 4 cups from the shelf is 12C4 = 495.   The number of ways of choosing 4 red cups is 7C4 = 35.   P(4 red cups) = 35/495=7/99.   The answer is 7/99.
<result>C</result>
There are 7 red cups and 5 blue cups on a shelf. If 4 cups are selected at random from the shelf, what is the probability that all 4 cups selected are red cups?