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    Marcov's Avatar
    Marcov Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 7, 2011, 10:55 PM
    self-service question
    At a self-service station, 30% of the customers pump regular gas; 30% pump
    midgrade gas, and 40% pump premium gas. Of those who pump regular gas,
    21% pay at least $30, Of those who pump midgrade gas 49% pays at least $30 . And
    of those who pump premium, 69% pay at least $30. What is the probability that
    next customer pays at least $30?
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Jul 8, 2011, 06:15 AM
    ModEDIT: Try not to give direct answers hkstroud. This is obviously homework and there are specific rules concerning them.
    I know it was a direct answer. I know it was homework. Having the answer won't do OP any good Op still has to show his/her work on paper.

    To the Moderator
    Please don't change my responses, I may not post on this board often but I'm no newbie around here.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #3

    Jul 8, 2011, 08:47 AM

    Show us your attempt Marcov.
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