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The probability distribution of a random variable X is given below  (i) Find the value of k. 

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The probability distribution of a random variable X is given below

(i) Find the value of k.

(ii) Find the mean and variance of the variable

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(i) We have sum of the probabilities is 1. 

k + 2k + 3k + 4k + 5k + 5k = 1 

⇒ k =\(\frac{1}{20}\)

(ii) Mean =

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