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Mathematics for IGCSE & O level - Probability (Section 3 - No. 40)

If the probability of event A is 0.6, what is the probability of the complement of A (not A)?
0.2
0.4
0.6
1.0

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P(not A) = 1 - P(A) = 1 - 0.6 = 0.4

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