<PRE><B>Question 737180</B>
Survey 240people consisting of 159boys and remaining girls rated a tv programme as Excellent Good Average.
Boys 42Excellent 70Good 47Average
Girls 38Excellent 30Good 13Average.

Quest: If a person is selected at random, what is the probability that he/she 

1. P(rated average given that she is a girl) = P(ave and girl)/P(girl)
= (13/240)/(81/240) = 13/81
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2. P(is a boy given that the rating is Excellent) = P(boy and elcell)/P(boy)
= (42/240)/(159/240) = 42/159

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Cheers,
Stan H.
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