Question: . Great Southern Consultants Group's computer system has been down several times over the past few months, as shown below. Number of breakdowns 0 1

. Great Southern Consultants Group's computer system has been down several times over the past few months, as shown below.

Number of breakdowns	0	1	2	3	4
Monthly frequency	9	2	4	4	1

Each time the system is down, the firm loses an average of $400 in time and service expenses. They are considering signing a contract for preventive maintenance. With preventive maintenance, the system would be down on average only 0.5 per month. The monthly cost of preventive maintenance would be $200 a month. Which is cheaper, breakdown or preventive maintenance?

THE TABLE ANSWER LOOKS LIKE THIS BELOW. HOW DO I GET THESE MONTHLY PROBABILTY NUMBERS FOUND BELOW

JUST LOOKING FOR AN EXPLANTATION NO NEED TO SOLVE THE WHOLE PROBLEM

NUMBER OF BREAKDOWNS	0	1	2	3	4	TOTAL
MONTHLY PROBABILITY	0.45	0.10	0.20	0.20	0.05	1.00

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