Consider a random variable X with the cumulative distribution function (a) P(X ≤ 40) ( (b) P(40 ≤X ≤ 60) (c) P(0 < X < 10) Z F(x)= 0 0.25 0.75 1 for x<-10, for 10 ≤ x < 30, - for 30 ≤ x < 50, for 50 ≤ x.

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