Suppose that X has a discrete distribution with the following cumulative distribution function 0.35 F(x) = If P(4 < X < 6) = 0.2, then a = O 0.45 None of these 0.55 0 0.15 a 0.55 for x < 1 for 1 ≤ x < 4 for 4 ≤ x < 6 for 6 ≤ x < 7 x ≥7 for
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