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An urn contains 5 red and 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. |
| Answer» An urn contains 5 red and 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. | |