Four balls are drawn at random from a bag containing 5 white, 4 red and 3 green balls. The probability that exactly two of them are white, is

A ball is drawn at random from a box containing 12 white, 16 red and 20 green balls. Determine the probability that the ball drawn is: (iv) red or white.

From a bag containing 5 white, 3 black and 2 red balls, two balls are drawn at random. Find the probability that both are white.

From a bag containing 2 white and 6 green balls, a ball is drawn at random. The probability of not a green ball is :

A bag contains 5 white, 4 black and 6 red balls. A ball is drawn at random. The probability that the balls drawn is not white is:

A bag contain n ball out of which some balls are white.If probability that a bag contains exactly i white ball is prooportional to i^(3).A ball is drawn at random from the bag and found to be white,then find the probability that bag contains exactly 2 white balls.

A bag contains 8 red, 3 white and 9 blue balls. Three balls are drawn at random from the bag. Determine the probability that none of the balls is white .

The probability of drawing 3 white and 4 green balls from a bag containing 5 white and 6 green balls if the seven balls are drawn at random simultaneously is

A bag contains 5 white and 7 red balls.One ball is drawn at random.What is the probability that ball drawn is white?

A bag contains 5 white balls, 6 red balls and 9 green balls. A ball is drawn at random from the bag. Find the probability that the ball drawn is : (iii) neither a green ball nor a white ball.