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Mathematics for IGCSE & O level - Probability (Section 3 - No. 44)
The probability of an event is 0.7. What are the odds *against* that event happening?
3:7
7:3
3:10
7:10
Explication
Odds against = P(not happening) / P(happening) = 0.3/0.7 = 3:7
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