A car gallery has an average of 60 customers per day. Given that usually 8% of these customers make a purchase. Find the following:
a. What is the probability that less than 10 customers will visit the gallery before making a purchase?
b. What is the standard deviation for the number of customers who will visit the gallery before making the first purchase?
c. What is the probability that at most 8 out of a 50 customers who visited the gallery one day will not buy a car?
d. If one day 80 customers visit the gallery. What is the probability that the number of selling cars will be between 3 to 5 cars?
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