The probability function of a discrete random variable X is given by p(x)=x^2 x =1,2,3. Find E(X)

The expectation of x, E(X), is the sum of the product of the value of the ith outcome (xi) and the probability of the ith outcome (pi). So:

E(X)=1+(42)+(93)=36

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Answered by Tanush M. Maths tutor

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