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1.BCG Inc. have 800 interns on average. An internship is generally for 2 years. At the end of the 2 yrs, some of the interns become associates while the others have to leave BCG. BCH needs to maintain an average level of 800 interns in order to obtain the desired level of associates. How many interns should BCG hire every year in this regard? (Hint: Apply Little's Law - identify Avg. Inventory, Flow Time - avg. time spend in system by an individual unit. Question asks for how many/yr?)

2.The output of a housecleaning process in a hotel = 80 rooms a day. The room rate for guests is $50/day.To accomplish this work, the hotel uses 5 employees working 8 hours/day at $15/hr; Cleaning supplies = $100/day, and depreciation on cleaning equipment = $75/day. What is the process system productivity (includes indirect costs)?

3.When a homeowner wants to sell his or her home, the property is typically posted on a regional listing service. In a particular region, 60% of the new properties added to the listing service in an average week are ``houses''. The remaining 40% of new listings added are "condominiums''. The average house listed on the service stays there (i.e. goes through the listing process) for 4 weeks, before it is either sold or the listing taken out for other reasons. The average condominium stays listed for 9 weeks. What percent of active property listings on the service (i.e., properties posted on the listing service but not yet removed) are condominiums? (Hint: what % of the listed inventory consists of condos?)