NCERT Class XII Mathematics Chapter - - Solutions

Question : 51

Total: 101

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 ?

Solution:

Let the sample space = {RR, RB, BR, BB}, where R = Red ball and B = Black ball. Since X represent the number of black balls
∴ X is a random variable, which can assume the value 0, 1, 2.

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