How to find expected value E(X) for a distribution

To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as E(X)=μ=∑xP(x).

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❖ -9.3 is NOT an integer.

An integer is a negative or positive whole number and 9.3 isn't a whole number.

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