1.

A random variable X has the following probability distribution Determine P(X

Answer»

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SOLUTION :`P(Xlt3)`=P(X=0 or 1 or 2)
=P(X=0)+P(X=1)+P(X=2)
=P(0)+P(1)+P(2)
(`because` X=0, X=1 and X=2 are THREE mutually EXCLUSIVE CASES)
=0+k+2k=3k=3/13


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