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A random variable X has the following pr...

A random variable X has the following probability distribution:
`{:(X=x,P(X=x)),(0,0),(1,k),(2,2k),(3,2k),(4,3k),(5,k^2),(6,2k^2),(7,7k^2+k):}`
Find the mean

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The correct Answer is:
3.66
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