A bag contains a number of coloured balls, with equal numbers of each colour. Adding 20 balls of a new colour. to the bag would not change the probability of drawing (without replacement) two balls of same colour. Then

There are three bags A, B and C. In each bag there are three types of coloured balls Yellow, Green and Black. In bag A, no. of yellow coloured balls are y and no. of green coloured balls are g. Number of green coloured balls are 4 more than the number of yellow coloured balls. When one ball is picked at random then the probability of getting black colour ball is (5)/(13) , The value of y is 18(2)/(11)% less then g. In bag B, number of yellow coloured balls is 22(2)/(9)% more than that of bag A. If two balls are picked at random from bag B then the probability of getting both green colour ball is (4)/(37) . Total number of balls in bag B is 75. In bag C, the ratio of number of green coloured balls and number of black coloured balls is 7 : 5. Total number of green and black coloured balls is 36. If one ball is picked at random then the probability of getting one yellow ball is (7)/(13) . Difference between the number of green balls in bag A and bag C is how much percent more/less than the sum of the number of black balls in bag A and bag C together?

Two balls are drawn at random from a bag containing 6 red and 4 green balls, find the probability that both ball are of same colour.

A bag initially contains one red and two blue balls. An experiment consisting of selecting a ball at random, noting its colour and replacing it together with an additional ball of the same colour. If three such trials are made then probability that all the drawn balls are red given that all the drawn balls are of same colour is p then the 10p is equal to

There are 5 different coloured balls and 5 boxes of the same colour as that of balls the number of ways that exactly two balls will go to its same coloured boxes is

A bag contains 4 red and 4 blue balls. Four balls are drawn one by one from the bag, then find the probability that the drawn balls are in alternate colour.

A bag contains 5 balls of unknown colours. A ball is drawn and replaced twice. On each occasion it is found to be red. Again, two balls are drawn at a time. What is the probability of both the balls being red?

A bag contians balls of two colours, 3 black and 3 white. What is the smallsest number of balls which must be drawn from the bag, without looking, so that the among these three are two of the same colour?

A bag contains 6 black and 3 white balls. Another bag contains 5 black and 4 white balls. If one ball is drawn from each bag, find the probability that these tow balls are of the same colour.

A bag contains 6 black and 3 white balls. Another bag contains 5 black and 4 white balls. If one ball is drawn from each bag, find the probability that these tow balls are of the same colour.