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Question
What are the properties of discrete random variable
Sum
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Solution
The probability mass function p(x) must satisfy the following conditions
(i) p(xi) ≥ 0 ∀ i
(ii) `sum_("i" = 1)^oo "p"(x_"i")` = 1
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Chapter 6: Random Variable and Mathematical expectation - Exercise 6.1 [Page 133]
