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23 June, 21:33

A survey of 100 households that own televisions found that 95 use a remote control. if you randomly knocked on two doors (from the sample of 100 households), what is the probability that the first homeowner would use a remote control and the second homeowner would not?

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  1. 23 June, 21:56
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    Probability of first using a remote = 95/100

    Probability of second not using a remote = 5/99

    Overall prob = (95/100) (5/99)

    95*5/100*99 = 475/9900 = 19/396
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