Reading Sports Swimming TOTAL reading sports swimming total Boys 2 20 8 30 Girls 4 7 9 20 TOTAL 6 27 17 50
P(Boy if favorite activity is swimming) P(Girl if favorite activity is sports) P(Girl if favorite activity is reading) P(Boy if favorite activity is sports) P(Favorite activity is swimming if a girl) P(Favorite activity is reading if a boy) P(Favorite activity is swimming if a boy) P(Favorite activity is reading if a girl
Tables like this one are common when one is discussing "conditional probability." What have you already learned about "conditional probability?"
For example, 'P(Favorite activity is reading if a girl " asks you to suppose that a student chosen at random happens to be a girl, what is the probability that reading is her favorite activity?
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