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6) The time taken for a vendor to deliver newspapers to his clients in a residential area is normally distributed with the mean 40 minutes

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6) The time taken for a vendor to deliver newspapers to his clients in a residential area is normally distributed with the mean 40 minutes and the standard deviation is 10 minutes. What is the probability that i). he will take more [lien 55 minutes to deliver the newspapers? ll]. he will take less than 33 minutes to deliver the newspapers? iii}. he will take between 38 and 50 minutes to deliver the newspapers

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