Question

0. In a bag there are 6 red balls and 9 green balls. Two balls are drawn at random. What is the probability that at least one of the balls drawn is r

Answer 1

Answer:

Number of ways 1 red ball and 1 green ball can be selected is 6C1X 9C1 ways Total number of ways by which any 2 balls can be selected is 9+6C2=15C2. Probability of E1 = 6C1X 9C1/15C2= 54/105.