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

An urn contains 6 red and 3 black balls. Two balls are randomly drawn. Let x presents the number of black balls. What are the possible value of x?

An urn contains 5 red 2 black balls.Two balls are randomly drawn,without replacement.Let X represent the number of black balls drawn. What are the possible values of X? Is X a random variable ? if yes,find the mean and variance of X.

An urn contains 5 red and 2 black balls. Two balls are drawn at random. X denotes number of black balls drawn. What are possible values of X?

There are 5 red and 2 black balls in a bag. Two balls are drawn at random. If X denotes the number of black balls, what are the possible values of X ?

A bag contains 4 red and 3 black balls.If one ball is drawn at random,then what is the probability of drawing a black ball?

A bag contains 8 red and 7 black balls. Two balls are drawn at random. The probability that both the balls are of the same colour is :

A bag contains 8 red and 7 black balls. Two balls are drawn at random. The probability that both the balls are of the same colour is :

A bag contains 8 red and 7 black balls. Two balls are drawn at random. The probability that both the balls are of the same colour is :