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An urn contains 5 red and 2 black identi...

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?

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Sample space S={RR, RB, BR, BB} X is a real valued function defined on S, which is taking the distinct value 0,1,2.
`therefore` X is a random variable.
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