Answer: The correct answer is e). 3.67%
Explanation: An ordinary annuity is a series of payments made at the end of each period.
The formula for ordinary annuity is PV = PMT × ((1 - (1 + r) ^ -n)/ r)
Where; PMT = the periodic cash payment; r = the interest rate per period; n = the total number of periods and PV = present value.
Therefore; 3500000 = 250000×((1-(1+r)^-20)/r
This will give the rate as 3.67%