2. The discrete random variable X has a cumulative distribution function F(x) defined by x <1 F(x)= x+k 8 (1. where k is
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2. The discrete random variable X has a cumulative distribution function F(x) defined by x <1 F(x)= x+k 8 (1. where k is
2. The discrete random variable X has a cumulative distribution function F(x) defined by x <1 F(x)= x+k 8 (1. where k is a constant and x an integer. (a) Find the value of k (b) Write the probability mass function of .X. 1≤x≤3. x23 [2 marks] [4 marks]
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