hw6-6 - Pr(good first serve, no point) = .15 Pr(bad first...

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Math 1160 – Section 6.6 Answer Key 9. 7/12 Draw the tree diagram. Add the probabilities of the branches that end with a red ball. The probabilities of the different branches are as follows: Pr(white ball, white ball) = 1/3 Pr(white ball, red ball) = 1/3* Pr(red ball, white ball) = 1/12 Pr(red ball, red ball) = 1/4* 21. Draw the tree diagram. The probabilities of the different branches are as follows: Pr(good first serve, win point) = .45
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Unformatted text preview: Pr(good first serve, no point) = .15 Pr(bad first serve, good second serve, win point) = .15 Pr(bad first serve, good second serve, no point) = .15 Pr(bad first serve, bad second serve) = .10 a. Pr(win point) = .45 + .15 = .60 b. Pr(first serve good given wins the point) = .45/.60 = .75 30a. Pr(General Motors) = .60 x .46 = .276 b. Pr(Ford or Toyota) = (.60 x .31) + (.40 x .32) = .314...
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