A) Rs. 9000
B) Rs. 8400
C) Rs. 7500
D) Rs. 8000
Correct Answer: D
Solution :
Let the principal be 7 x |
Now, \[CI=P\left[ {{\left( 1+\frac{R}{100} \right)}^{T}}-1 \right]\] |
\[\Rightarrow \] \[1261=x\left[ {{\left( 1+\frac{5}{100} \right)}^{3}}-1 \right]\] |
\[\Rightarrow \] \[1261=x\left( \frac{9261}{8000}-1 \right)\] |
\[\Rightarrow \] \[1261=x\left( \frac{9261-8000}{8000} \right)=\frac{1261x}{8000}\] |
\[\therefore \] \[x=\frac{1261\times 8000}{1261}=\]Rs. 8000 |
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