From a box containing some red balls and some blue balls the probability of getting a red ball is `a/b`. What is the probability of getting a blue ball?.

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of red ball, the number of blue balls must be

One box contains 7 red balls and 5 blue balls. Another box contains 5 yellow and 9 green balls. What is the probability of getting blue balls from the first box?

One box contains 7 red balls and 5 blue balls. Another box contains 5 yellow and 9 green balls. What is the probability of getting red balls from the first box?

One box contains 7 red balls and 5 blue balls. Another box contains 5 yellow and 9 green balls. What is the probability of getting green balls from the second box?

One box contains 7 red balls and 5 blue balls. Another box contains 5 yellow and 9 green balls. What is the probability of getting yellow balls from the second box?

12 balls are in a box. 5 among them are blue and others are black. Without loọking into the box, one ball is taken a) Find the probability of getting a blue ball? b) After putting one blue ball and one black ball into the basket, a ball is taken. Is the probability of getting a blue ball increases or decreases? Justify your answer.

One box contains 8 black balls and 12 white balls. Another box contains 9 black and 6 white balls. One ball is taken from each box at random.What is probability of getting both black? What is the probabilty of getting both white? What is the probability of getting one black and one white?

A box contains some green and blue balls. 7 red balls are put into it. Now the probability of getting a red ball from the box is 7/24 and that of a blue ball is 1/6 . How many balls are there in the box?

A box contains some green and blue balls. 7 red balls are put into it. Now the probability of getting a red ball from the box is 7/24 and that of a blue ball is 1/6 . How many of them are blue?