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Multiple Choice
When determining the accumulation value of a deferred annuity, which formula is most appropriate to use?
A
Present Value of an Ordinary Annuity: \( PV = PMT \times \frac{1 - (1 + r)^{-n}}{r} \)
B
Future Value of a Single Sum: \( FV = PV \times (1 + r)^n \)
C
Future Value of an Ordinary Annuity: \( FV = PMT \times \frac{(1 + r)^n - 1}{r} \)
D
Present Value of a Single Sum: \( PV = \frac{FV}{(1 + r)^n} \)
Verified step by step guidance
1
Step 1: Understand the concept of a deferred annuity. A deferred annuity involves periodic payments (PMT) that begin after a certain deferral period, and the accumulation value refers to the total value of these payments at a future date, including interest earned.
Step 2: Identify the correct formula for the accumulation value of a deferred annuity. The formula for the Future Value of an Ordinary Annuity is: \( FV = PMT \times \frac{(1 + r)^n - 1}{r} \), where \( r \) is the interest rate per period, \( n \) is the number of periods, and \( PMT \) is the periodic payment.
Step 3: Break down the formula. The term \( (1 + r)^n \) represents the compounding factor over \( n \) periods, \( (1 + r)^n - 1 \) calculates the total growth minus the initial principal, and dividing by \( r \) adjusts for the periodic payment structure.
Step 4: Apply the formula to the problem. Substitute the given values for \( PMT \), \( r \), and \( n \) into the formula \( FV = PMT \times \frac{(1 + r)^n - 1}{r} \). Ensure that the interest rate \( r \) is expressed as a decimal (e.g., 5% = 0.05).
Step 5: Perform the calculations step by step. First, calculate \( (1 + r)^n \), then subtract 1, divide the result by \( r \), and finally multiply by \( PMT \) to find the accumulation value. This will give the future value of the deferred annuity.