When the interest rate is a constant 10% p.a., an annuity with 25 constant annual payments has a future value of $49,173.53 at the last payment. What is the constant annual payment amount?
$450.38 |
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$500.00 |
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$1,000.00 |
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$1,966.94 |
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Cannot be determined, insufficient information |
Option (b) is correct
Here, the deposits will be same every year, so it is an annuity. The future value of annuity is $49173.53. Here we will use the future value of annuity formula as per below:
FVA = P * ((1 + r)n - 1 / r)
where, FVA is future value of annuity = $49173.53, P is the periodical amount, r is the rate of interest = 10% and n is the time period = 25
Now, putting these values in the above formula, we get,
$49173.53 = P * ((1 + 10%)25 - 1 / 10%)
$49173.53 = P * ((1 + 0.10)25 - 1 / 0.10)
$49173.53 = P * ((1.10)25 - 1 / 0.10)
$49173.53 = P * ((10.8347059434- 1 / 0.10)
$49173.53 = P * (9.8347059434/ 0.10)
$49173.53 = P * 98.3470594339
P = $49173.53 / 98.3470594339
P = $500
So, constant payment amount is $500.
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