If a certain sum amounts to ₹12,100 in 2 years at 10% compound interest compounded annually, what is the principal sum? यदि कोई धनराशि 10% वार्षिक चक्रवर्धि ब्याज की दर से 2 वर्ष में ₹12,100 हो जाती है, तो मूलधन क्या है?
A
₹9,000 (₹9,000)
B
₹10,000 (₹10,000)
C
₹11,000 (₹11,000)
D
₹8,500 (₹8,500)
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Correct Answer ₹10,000
Explanation
Amount $= P(1 + R/100)^T \Rightarrow 12100 = P(1.1)^2 \Rightarrow 12100 = P imes 1.21 \Rightarrow P = 10000$.