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Q.What is the present value of an annuity due of ₹ 1,500 for 16 years at 8% per annum ?
[(1.08)−16=0.2919][(1.08)^{-16}=0.2919]

Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Commerce Board 2025Subjective· 2mImportance★★★★★
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Use the annuity-due present-value formula P=Ai[1−(1+i)−n](1+i)≈₹14,339.03P=\dfrac{A}{i}\big[1-(1+i)^{-n}\big](1+i)\approx ₹14{,}339.03.

An annuity due has payments made at the beginning of each period, so its present value is the ordinary-annuity present value multiplied by (1+i)(1+i):

P=Ai[1−(1+i)−n](1+i).P=\frac{A}{i}\big[1-(1+i)^{-n}\big](1+i).

Given: A=₹1,500A=₹1{,}500, i=8%=0.08i=8\%=0.08, n=16n=16, and (1.08)−16=0.2919(1.08)^{-16}=0.2919.

Step 1 — Ordinary-annuity present value.

Ai[1−(1+i)−n]=15000.08 (1−0.2919)=18750×0.7081.\frac{A}{i}\big[1-(1+i)^{-n}\big]=\frac{1500}{0.08}\,(1-0.2919)=18750\times 0.7081.

=₹13,276.875.=₹13{,}276.875.

Step 2 — Adjust for annuity due (multiply by 1+i1+i). …

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