Which of the following is a valid option for the cdf of X? P(X ≤ x)=().x=6, 12, 18 P(X ≤2)=202-960x = 6, 12, 18 P(X ≤ x)=().x = 6, 12, 18 24 18 OP(Xx)=-288x=6, 12, 18 144

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