Question: There are 5 balls in a box, one red ball, one yellow ball, and three green balls. Assuming that the probability of each ball being

There are 5 balls in a box, one red ball, one yellow ball, and three green balls. Assuming that the probability of each ball being drawn is equal, now randomly take a ball from the box. Please calculate (a) What is the expectation of the color of the ball? 2) What is the variance of the color of the ball?

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