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[其他] 數學高手請入

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數學高手請入

幫解答一下 以下問題
關於概率 請詳細 步驟解答..

1. Abe, Bernadette, and Chris toss a coin one after another. The first one to throw a head wins the game. What are the respective chances of Abe, Bernadette, and Chris winning the game?

答案係 Abe=0.5714 Bernadette=0.2857, Chris=0.1429

2. A survey taken of 200 indivuals to ascertain whether they undertook regular exercise obtained the following results:

Under 50 years of age :
Exercises regularly 55
Does not exercise 40

50 years of age and over:
Exercises regulaly 20
Does not exercise 85

find the probability that given that a person does not exercise they are under 50 years of age

答案係0.32


答案係本書抄出黎,我想要步驟

[ 本帖最後由 花老野 於 2011-11-2 15:36 編輯 ]

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頭香 數學好屎 幫你推推喇

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D數太深 吾識


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深得過份囉- -要系高高手先識

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希望有人解答到...............................

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D高手味放學~~~~~~~~~~~~~~~~~~~~~~

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搵A_c


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中文的數學我就應該。。  

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Form幾?
用緊咩書?

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英文真係考起我

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我想問
Under 50 years of age :
Exercises regularly 55
Does not exercise 40

50 years of age and over:
Exercises regulaly 20
Does not exercise 85

指人數?

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未教到     

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雞腸海冇興趣
有中文 ?

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唔識睇英文

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你轉番中文得唔得=.=?

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