A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability that it is greenis . Find the number of blue marbles in the jar.

A jar contains 24 marbles , some are green and other are blue . If a marble is drawn, at random from the jar , the probability that it is green is 2/3 . Find the number of blue balls in the jar .

A bag contains 15 balls, some are red and others are white. If a ball is drawn at random from the bag, the probability that it is red is 1/5 . Find the number of white balls in the bag.

A box contains 3 blue, 2 white, and 4 red marbles. If a marble is selected at random from the box, what is the probability that it will be (i) white? (ii) blue? (iii) red?

A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Find x.

A bag contains 3 red and 2 blue marbles. A marble is drawn at random. What is the probability of drawing a blue marble ?

A box contains 2 blue marbles, 4 green marbles and 7 red marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) blue (ii) Not blue?

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bag is thrice that of drawing a red ball, then find the number of blue balls in the bag.

A bag contains 6 blue balls and 5 green balls and 2 red balls. A ball is chosen at random. What is the probability of getting a red ball?

A bag contains 12 blue balls and x red balls. If one ball is drawn at random (i) what is the probaility that it will be a red ball ? (ii) If 8 more red balls are put in the bag, and if the probability of drawing a red ball will be twice that of the probaility in (i), then find x.