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. Assume the invoices are stored and managed from a central database.
What is the probability that a randomly selected invoice from the database is over 90 days old and from the Seattle office?
A)0.2702
B)0.0231
C)0.3461
D)0.7765

Question

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.  Assume the invoices are stored and managed from a central database.
What is the probability that a randomly selected invoice from the database is over 90 days old and from the Seattle office?
A)0.2702 
B)0.0231 
C)0.3461 
D)0.7765

Quizplus · Accepted Answer

To find the probability that a randomly selected invoice is over 90 days old and from the Seattle office, we need to use the information given in the table. From the table, we see that there are 57 invoices over 90 days old and 14 of them are from the Seattle office. Therefore, the probability of selecting an invoice that is both over 90 days old and from the Seattle office is:

P(over 90 days and from Seattle) = (number of invoices over 90 days and from Seattle) / (total number of invoices)
= 14 / 607
= 0.0231

Therefore, the best choice is B.

Micron Technology Has Sales Offices Located in Four Cities: Dallas,Seattle,Boston,and