A Catalog Company That Receives the Majority of Its Orders

question 126

Multiple Choice

A catalog company that receives the majority of its orders by telephone conducted a study to determine how long customers were willing to wait on hold before ordering a product. The length of time was found to be a random variable best approximated by an exponential distribution with a mean equal to 3 minutes. Find the waiting time at which only 10% of the customers will continue to hold.

• A) 2.3 minutes
• B) 6.9 minutes
• C) 3.3 minutes
• D) 13.8 minutes

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