This Exam P sample reference tests Insurance Payment Variables. This is an expected payment calculation under a 500 deductible followed by a fixed premium loading. Applying the deductible to each positive loss gives expected payment 945; adding 75 gives premium 1,020 and choice C.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
AThe value 870 subtracts the 75 loading from the expected payment instead of adding it.
BThe value 945 is the expected insurer payment after the deductible but before the fixed premium loading.
DThe value 1,070 is the expected loss before applying the deductible and before adding the loading.
EThe value 1,145 adds 75 to the expected raw loss 1,070, so it charges the loading but ignores the deductible.
Original practice · fully worked
Original variant: capped shared repair reimbursement
A device repair loss L is 0, 400, or 1,000 with probabilities 0.50, 0.30, and 0.20. A plan reimburses 50% of the amount above a 200 deductible, subject to a maximum reimbursement of 300. The plan premium equals the expected reimbursement plus a fixed charge of 20. Calculate the premium.
A 30
B 60
C 90
D 110
E 130
Variant answer in brief
The three reimbursements are 0, 100, and 300 after applying the deductible, 50% share, and cap. Their expected value is 90, and the fixed charge raises the premium to 110, choice D.
Setup
Setup
Write the reimbursement transformation including the deductible, sharing percentage, and cap.
Y=min{0.5(L−200)+,300}
Model
Model
Evaluate the reimbursement at each possible loss.
Y(0)=0,Y(400)=100,Y(1000)=300
Compute
Compute
Take the expected reimbursement and then add the fixed charge.
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