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Unformatted text preview: book 5% of the time and he forgets both 2% of the time. (a) What is the probability that, on any one day, he will have both his bankers card and his cheque book? (b) What is the probability that he will nd his bankers card in his pockets given that he has already found his cheque book? 6. A motor car is placed in the luxury class for the purposes of taxation if its engine has no fewer than six cylinders or a capacity of no less than 3 litres. 15% of all cars have no fewer than six cylinders, and 10% have no less than 3 litres. We know that 80% of all cars of 3 litres and more have at least six cylinders. What proportion of all cars fall in the luxury class?...
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 Spring '12
 D.S.G.Pollock

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