If there are 15 balls in a bag with 6 red, 4 white and 5 yellow, then the probability of drawing a yellow ball is.

A bag contains 3 red,4 white and 7 black balls.The probability of drawing a red or a black ball is

If 1 ball is taken from 6 black, 4 white and 3 yellow balls, then probability that it is yellow or white is

There are 5 red and 4 black balls in a bag. The probability of drawing a red ball is:

A bag contains 20 balls out of which x balls are white.If one ball is drawn at random,the probability drawing a white ball is y.Now place this ball and 10 more white balls in the bag.Now if a ball is drawn from the bag,the probability of drawing the white ball is 2y. Find x.

In bag A there are 8 red balls ,X green balls and 6 yellow balls,probability of drawing one green ball from bag A is 3/5. bag B there are (X-3) red balls, (X-9) green balls and 6 yellow balls ,2 balls are drawn from bag B. Find the porbability that both the balls are red colour ?

Study the following information carefully and answer the given questions. There were some red, some green and some white balls in a bag. Probability of drawing 1 white ball from the bag is . (1)/(3) If there were 6 more red balls in the bag, the probability of getting 1 green ball would have been (1)/(30) less. If ratio of number of red balls and white balls is 7 : 5, then what is the probability of drawing 2 balls such that one is red and other is white?

A bag contains x red balls, (x + 5) blue balls and (3x + 10) white balls. If the probability of drawing a blue ball is 2/9 , what is the number of white balls?