An urn contains 4 white and 3 red balls. Let X be the number of red balls in a random draw of three balls. Find the mean and variance of X.

An urn contains 4 white and 3 red balls. Let X be the number of red balls in a random draw of 3 balls. Find the mean and variance of X.

An urn contains 4 white and 3 red balls. Let X be the number of red balls in a random draw of 3 balls. Find the mean and variance of X.

An urn contians 4 white and 3 red balls. Let X be the number of red balls in a random draw of 3 balls. Find the mean and variance of X.

Three balls are drawn simultaneously from a bag containing 5 white and 4 red balls. Let X be the number of red balls drawn. Find the mean and variance of X.

An urn contains 4 white and 3 red balls. Find the probability distribution of the number of red balls in a random draw of three balls.

An urn contains 4 white and 3 red balls. Find the probability distribution of the number of red balls in a random draw of three balls.

An urn contains 4 white and 3 red balls. Find the probability distribution of the number of red balls in a random draw of three balls.

An urn contains 4 white and 3 red balls.Find the probability distribution of the number of red balls in a random draw of three balls.

An urn contains 4 white and 3 Red balls. Find the probability distribution of the number of red balls in three draws when a ball is drawn at random with replacement . Also find its mean and variance.