An urn contains 25 balls of which 10 balls bear a mark "X" and the remaining 15 bear a mark T. A ball is drawn at random from the urn, its mark is noted down and it is replaced. If 6 balls are drawn in this way, find the probability that (i) all

An urn contains 25 balls of which 10 balls bear a mark "X" and the remaining 15 bear a mark Y. A ball is drawn at random from the urn, its mark is noted down and it is replaced. If 6 balls are drawn in this way, find the probability that (i)    all will bear "X" mark. (ii)   not more than 2 will bear "Y" mark, (iii) at least one ball will bear "Y" mark. (iv) the number of balls with "X" mark and Y mark will be equal.

An urn contains 25 balls of which 10 bear a mark 'x' and the remaining 15 bear a mark Y'. A ball is drawn at random from the urn, its mark noted down and it is replaced. If 6 balls are drawn in this way, find the probability that (i) all will bear mark 'X', (ii) not more than two will bear 'Y" mark, (iii) at least one ball will bear 'X' k and 'Y" mark will be equal

An urn contains 6 balls of which two are red and four are black. Two balls are drawn at random. Probability that they are of the different colours is

An urn contains 4 white 6 black and 8 red balls. If 3 balls are drawn one by one without replacement, find the probability of getting all white balls.

An urn contains four balls bearing numbers 1, 2, 3 and 123 respectively. A ball is drawn at random from the urn. Let E_i , i = 1, 2, 3 denote the event that digit i appears on the ball drawn. Which one of the following is not true?

An urn contains 2 white and 2 black balls.A ball is drawn at random.If it is white,it is not replace into urn,otherwise it is replaced along with another ball of the same colour.the process is repeated,then find the probabiltiy that the third ball drawn is black.

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls.One ball is drawn at random from urn A and placed in urn B.Then,one ball is drawn at random from urn B and placed in urn A.If one ball is drawn at random from urn A,the probability that it is found to be red,is....

Threre are 9 red,7 white and 4 black balls in an urn. Two balls are drawn at random from the urn. What will be the probability that both the balls are red ?

An urn contains one black ball and one green ball. A second urn contains one white and one green ball. One ball is drawn at random from each urn. What is the probability that both balls are of same colour?