1. Math
  2. Statistics And Probability
  3. 1 customers who are registered on a corporate web site...

Question: 1 customers who are registered on a corporate web site...

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1. Customers who are registered on a corporate web site are summarized by the type of shipping contract they use and the number of orders in the previous month. The number of customers in each category are shown in the following table Shipping Contract No orders One order More than one order 40 Total Express 25 65 Standard 15 45 20 80 40 110 60 210 130 (a) If customers are selected at random without replacement, how many unique samples of eight express and ten standard customers are possible? Order does not matter. (2 pts) (b) Suppose 10 express and 15 standard customers are selected without replacement. What is ability of selecting exactly one express customer with no orders last month and exactly one standard customer with no orders last month? (3 pts) (c) Suppose that three customers are selected randomly, without replacement, for a survey What is the probability that at least two selected customers use express shipping? (4pts) (d) What is the probability that a randomly selected customer uses standard shipping or had no orders? (4 pts)

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