A small call center business decided to install an email system to facilitate communications in the office. As part of the upgrade the vendor offered to supply anti-malware software for a cost of 5,000 per year. The IT manager read there was a 90% chance each year that workstations would be compromised if not adequately protected. If workstations are compromised it will take three hours to restore services for the 30 staff. Staff members in the call center are paid $90 per hour. If determining the risk, which of the following is the annual loss expectancy (ALE)?
A.
$2,700
B.
$4,500
C.
$8,100
D.
$7,290
Ok I did the math on this problem and I can’t seem to findout how the answer is D.&7290 because if you multiply 30 by 90 you get 2700, then multiply that by 3 you $8100. So can someone tell me what I’m doing wrong
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Annual Loss Expectancy (ALE) is Single Loss Expectancy (SLE) * Annual Rate of Occurrence (ARO)
SLE = 3 hours * $90 per hour * 30 employees.
ARO = 90/100 or .9
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