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S2 Continious Random Variable- quick question

Part b, I don't understand why the answer is 1. Any explanations for me?
Original post by Xphoenix
Part b, I don't understand why the answer is 1. Any explanations for me?


Because this a continuous random variable. P(X=a) for any value of "a" is 0, so P(X not= a) must be 1- 0 = 1.

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