The probability of getting a blue ball from a bag of six balls as shown in figure is
A bag has 9 red, 7 green and 4 blue balls. A student randomly selects a ball from the bag. The probability of not getting a blue ball is
A bag contains 1 red ball, 1 green ball, 2 blue balls and 1 black ball. What is the probability of getting a white ball?
A bag contains 6 red balls & some blue balls. If probability of drawing a blue ball from the bag is thrice the probability of drawing a red ball. Find the number of blue balls in the bag.