An urn contains 5 red and 2 black identical balls. Two balls are randomly drawn. Let X represent the number of black balls. What are the values of X? Is X a random variable?

A box contains 5 white, 7 red and 8 black balls. If four balls are drawn by one with replacement what is the probability that All are white?

A box contains 3 red and 4 blue balls. Two balls are drawn one by one without replacement. Find the probability of getting both balls red.

An urn contains 4 black. 5 rvhite and 6 red balls. one ball is drawn at random. The probability that it is not black is

A box contains 5 white, 7 red and 8 black balls. If four balls are drawn by one with replacement what is the probability that None is white?

A box contains 1 red and 3 identical white balls. Two balls are drawn at random in succession without replacement. Write the sample-space for this experiment.

A bag contains 6 red and 12 green balls. two balls are drawn. What is the probability that one is red and other is green?

A box contains 1 red and 3 inddentical white balls. Two balls are drawn at random in succession without replacement. Write the sample space for this experiment.

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?

A bag contains 5 white and 3 black balls. Two balls are drawn at random one after the other without replacement. Find the probability that both balls drawn from the bag are black.