推 nana0130:謝謝你 10/20 12:05
※ 引述《nana0130 (小那)》之銘言：
: 題目有點長，不好意思
: 長到我有點判斷不出來這是要用什麼方法作
: Consider the following information about travelers on vacation (based partly
: on a recent Travelocity poll)
畫圖
: 40% check work e-mail
A
: 30% use a cell phone
B
: 25% bring a laptop with them
C
: 23% both check work e-mail and use a cell phone to stay connected
A∩B
: 51% neither check work nor use a cell phone to stay connected nor bring
: a laptop.
c c c
A ∩ B ∩ C
: In addition, 88 out of every 100(每100個人中就有88個人) who bring a laptop
: also check work e-mail.
A|C
: 70 out of every 100 who use a cell phone to stay connected alse bring a
: laptop.
C|B
: b. What is the probability that someone who brings a laptop on vacation
: also uses a cell phone to stay connected ?
B|C
: c. If the randomly selected traveler check work e-mail and brought a laptop
: , what is the probability that he/she uses a cell phone to stay connected?
B|A∩C
: 感激不盡~
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如果這份悲痛讓妳痛不欲生
它也會終結別處的痛楚
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