A bag contains 2 red, 3 green and 2 blue balls. 2 balls are to be drawn randomly. What is the probability that the balls drawn contain no blue ball?
Choose the most appropriate option:
A) 5⁄7
B) 10⁄21
C) 2⁄7
D) 11⁄21
E) None of these
Reqd probability = 5C2/7C2=5×4/7×6=10/21   Answer 10⁄21
<result>B</result>
A bag contains 2 red, 3 green and 2 blue balls. 2 balls are to be drawn randomly. What is the probability that the balls drawn contain no blue ball?