Please Help Me!! I will Medal!!!
(Picture included) Why is my selection incorrect???
The following table shows the probability distribution for a discrete random variable.
What is the mean of this discrete random variable? (That is, what is E(X), the expected value of X?)

Question

anonymous · Answer

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anonymous · Answer

@Hero @ganeshie8  Please help? Where am I wrong? I added all of X and divided by as many there was.

anonymous · Answer

$$E(X) = \frac{ \sum_{}^{}p(x).x }{  \sum_{}^{}p(x) }$$

anonymous · Answer

I do not understand that....