Question -
a) It has been noted by Pete from Pete's Computers that 30% of customers will purchase the extended warranty when they purchase a desk-top computer. A sample of 15 customers that have just purchased a desk-top computer was taken. What is the probability that more than 7 also purchased the extended warranty?
b) A life insurance salesman knows that the numbers of policies he sells per week is Poisson distributed with an average 5 life insurance policies per week. Assuming that there are 5 working days per week, what is the probability that in a given day he will sell exactly 2 policies?