A bag contains 4 white and 5 blue balls. They are mixed thoroughly and one ball is drawn at random. What is the probability of getting (i) a white ball? (ii) a blue ball?
(i) Total number of balls bag containing is: 4 white + 5 blue = 9 balls
Number of white balls = 4.
Probability P() = 
Probability of getting a white ball P(W) = 
= 
(ii) Total number of balls bag containing is: 4 white + 5 blue = 9 balls
Number of blue balls = 5.
Probability P() = 
Probability of getting a blue ball P(B) = 
= 
4