Original practice · fully worked
Original variant: price of a fixed arithmetic payment schedule
A training grant pays 100 at year 1 and then increases each annual payment by 20 for a total of eight payments. At a 6% annual effective yield, calculate the present value of the grant.
- A
916.03 - B
966.92 - C
1,017.81 - D
1,068.70 - E
1,119.59
Answer and calculation
Discounting the eight payments 100, 120, through 240 at 6% gives present value 1,017.81, choice C.
Setup
Setup
List the arithmetic payment rule over the eight year-end dates.
Pk=100+20(k−1),k=1,…,8 Model
Model
Discount each generated payment at the common 6% annual yield.
PV=k=1∑8[100+20(k−1)](1.06)−k Compute
Compute
The direct eight-term sum is 1017.810995.
PV=1017.81099451 Answer
Answer
The grant's present value is 1,017.81, which is choice C.
PV≈1017.81(C)