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Q. 1.     State which of the following are not the probability distributions of a random variable. Give reasons for your answer.

            (iv) 

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As we know sum of probabilities of a probability distribution is 1.

Sum of probablities =0.3+0.2+0.4+0.1+0.05=1.05\neq 1

\therefore The given table is not a the probability distributions of a random variable because sum of probabilities is not 1.

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seema garhwal

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