Consider a two-way table that summarizes age and ice cream preference. Of the children, 7 prefer vanilla, 12 prefer chocolate, and 3 prefer butter pecan. Of the adults, 10 prefer vanilla, 31 prefer chocolate, and 8 prefer butter pecan. What is the conditional probability that a person prefers vanilla, GIVEN THAT the person is an adult?

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Answer 1 · 2018-06-17T17:24:44

#10/49#

in total there are #10 + 31 + 8# adults, which is #49# adults.

of the #49# adults, #10# prefer vanilla.

#10/49# of the adults prefer vanilla. hence, the probability of choosing someone who prefers vanilla out of the adults is #10/49#.