Micron technology has sales offices located in four cities

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Micron Technology has sales offices located in four cities: Dallas, Seattle, Boston, and Los Angeles. An analysis of the company's accounts receivables reveals the number of overdue invoices by days, as shown here.

Days Overdue Dallas Seattle Boston Los Angeles

Under 30 days 137 122 198 287

30-60 days 85 46 76 109

61-90 days 33 27 55 48

Over 90 days 18 32 45 66

Assume the invoices are stored and managed from a central database.

a. What is the probability that a random selected invoice from the database is from Boston sales office?

b. What is the probability that a random selected invoice from the database is between 30 and 90 days overdue?

 

c. What is the probability that a random selected invoice from the database is over 90 days old and from the Seattle office.

d. If a randomly selected invoice is from the Los Angeles office, what is the probability that it is 60 or fewer days overdue?

 

Reference no: EM13605089

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