My Math Forum From a city population , the probability of selecting i ) a

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 October 31st, 2013, 04:50 PM #1 Senior Member   Joined: Oct 2009 Posts: 895 Thanks: 1 From a city population , the probability of selecting i ) a From a city population , the probability of selecting i ) a male or a smoker is 7/10 ii) a male smoker is 2/5 iii) a male if smoker is already selected is 2/3 Find the probability of selecting a ) a non -smoker b ) a male c ) a smoker if a make is first selected
 October 31st, 2013, 06:17 PM #2 Senior Member   Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53 Re: From a city population , the probability of selecting i Use the formulas $P(A|B)=\frac{P(A\cap B)}{P(B)}$ and $P(A\cup B)+P(A\cap B)=P(A)+P(B)$
 October 31st, 2013, 11:22 PM #3 Senior Member   Joined: Oct 2009 Posts: 895 Thanks: 1 Re: From a city population , the probability of selecting i Hi As I know there is some words that will change the formula what is that words ?

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# From a city population the probability of selecting a male or smoker is 7/10 solution of this probability question

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