A laptop is available for ₹25,800 in cash or for ₹4,200 as a down payment and three equal annual instalments. If the seller charges interest at 12% per annum compounded annually, calculate the amount of each instalment.

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1. Find present value (PV) of the instalments: PV = ₹25,800 - ₹4,200 = ₹21,600.

2. PV of three yearly instalments $I$ at 12% is $I\left(\dfrac{1}{1.12}+\dfrac{1}{1.12^2}+\dfrac{1}{1.12^3}ight)$.

3. Compute the factor: $\dfrac{1}{1.12}+\dfrac{1}{1.12^2}+\dfrac{1}{1.12^3}=2.401831269\dots$.

4. Solve $I	imes 2.401831269=21,600\Rightarrow I=\dfrac{21,600}{2.401831269}\approx\)₹8,993.

FINAL_ANSWER: a

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