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In a single throw of a dice; if X denote...

In a single throw of a dice; if `X` denotes the number on its upper face. Find the mean of `X`.

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RD SHARMA ENGLISH-MEAN AND VARIANCE OF A RANDOM VARIABLE -All Questions
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  16. If X is a random variable with probability distribution as given below...

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  20. Let X be the discrete random variable. Then the variance of X is (a). ...

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