Answer:
a). SLE =$37.5
b). ARO =75
c). ALE = $2,812.5
Explanation:
a).Single loss Expectancy (SLE) is starting point in determining the single loss of an asset that will occur and calculated this;
SLE = asset value * exposure factor.
Asset value =$500,
Exposure factor is simply the percentage of asset lost.
In this case out of 1000 phones, 75 were damaged or loss.
In percentage;
75 ÷ 1000 =0.075, 0.075×100=7.5%(exposure factor).
Therefore,
SLE = $500×7.5%= $37.5.
b). ARO - Annual Rate of Occurrence is the number of times a threat on a single asset is expected to occur in one year.
In the case the damage or loss occured in 75 devices in one year.
c). ALE - Annualized loss Expectancy is the product of SLE and ARO.
Therefore;
ALE = $37.5 × 75 = $2,812.5.
