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Question

A sum amounts to Rs. 882 in 2 years at 5% compound interest. The sum is


A

800

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B

840

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C

822

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D

842

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Solution

The correct option is A

800


Let the sum be P
Amount after 2 years =P(1+r100)n=P(1+5100)2

=P(105100)2=P(2120)2

Given, that amount after 2 years = 882

P(2120)2=882

P=882×20×2021×21=2×20×20= Rs. 800


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