Answer to Question #18748 in Statistics and Probability for Mackos

Question #18748

Hi, the topic is Probability Density Function of a random variable.
For each of the following, find the constant c so that p(x) satisfies the condition of being a probability density function of a random variable X:
I. p(x) = c(2/3)^x, X ∈ N
II. p(x) = cx, x ∈ {1,2,3,4,5,6}
I've been figuring this for couple of days.

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