# T nusfosdsap lecture 3 12 gem2900 understanding

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Unformatted text preview: and started drinking.” “Oh…” says Mrs. T, “that sounds more likely.” “th “No,” says Mrs. B, “I think you mean less likely.” Who’s right? Mrs. B or Mrs. T? NUS/FOS/DSAP Lecture 3 – 12 GEM2900 - Understanding Uncertainty & Statistical Thinking Semester 1, 2012/2013 The The Rule Book… When events A and B have no outcomes in common, then A∩B = ∅. They are said to be ‘mutually exclusive’ or ‘disjoint events’. If A∩B = ∅, then P(A∪B) =P(A)+P(B) When two events cannot occur concurrently, then the probability of either of the two events occurs equals to the sum of the individual equals to the sum of the individual probabilities. NUS/FOS/DSAP Lecture 3 – 13 GEM2900 - Understanding Uncertainty & Statistical Thinking Semester 1, 2012/2013 The Rule Book… Example... In his best seller, Innumeracy,...
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