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Mathematics for IGCSE & O level - Probability (Section 2 - No. 15)

If the probability of an event is 0.6, what are the odds against that event occurring?
2:3
3:2
1:6
6:1

解释

Odds against = P(not A) / P(A) = 0.4/0.6 = 2/3 or 2:3

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