What should be the value c so that the function f( x ) 1 c ( x 2 4 8), for x 0, 1, 2, 3 can serve as a probability distribution of the discrete random variable X

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Question: What should be the value c so that the function f( x ) = 1/ c * ( x 2 + 4.8), for x =

What should be the value c so that the function f(x) = 1/c * (x² + 4.8), for x = 0, 1, 2, 3 can serve as a probability distribution of the discrete random variable X?

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