A bag contains 5 black and 6 white balls; two balls are drawn at random. What is the probability that the balls drawn are white?

Question: A bag contains 5 black and 6 white balls; two balls are drawn at random. What is the probability that the balls drawn are white?
​
​​​Solution:
​Given that,
​Number of black balls = 5
​Number of white balls = 6

​Now,
​Favorable event = ⁶C₂ = 15
​Total possible events = ¹¹C₂ = 55
​
​∴ Probability = 15/55 = 3/11