The question given below consists of  a statement and/or a question and two statements numbered I and II given below it.  You have to decide whether the data provided in the statements is/are  sufficient to answer the given question.  Read the both statements and give answerWhat was the total compound interest on a sum after three years ? I. The interest after one year was 100 and the sum was 1000. II. The difference between simple and compound interests on a sum at the end of two years was 10.

# The question given below consists of  a statement and/or a question and two statements numbered I and II given below it.  You have to decide whether the data provided in the statements is/are  sufficient to answer the given question.  Read the both statements and give answerWhat was the total compound interest on a sum after three years ? I. The interest after one year was 100 and the sum was 1000. II. The difference between simple and compound interests on a sum at the end of two years was 10.

1. A

if  the data in Statement-I alone are sufficient to answer the question, while the data in Statement-II alone are not sufficient to answer the question

2. B

if  the data in Statement-II alone are sufficient to answer the question, while the data in Statement-I alone are not sufficient to answer the question.

3. C

if  the either in Statement-I or Statement-II alone are sufficient to answer the question

4. D

if  the data even in both Statements I and II together are not sufficient to answer the question

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### Solution:

Solution: $C.I=100$

$\begin{array}{l}Sum=1000\\ Rate\text{\hspace{0.17em}\hspace{0.17em}}of\text{\hspace{0.17em}\hspace{0.17em}interest}=10%\\ 1st\text{\hspace{0.17em}\hspace{0.17em}}year⇒1000+100=1100\\ 2nd\text{\hspace{0.17em}\hspace{0.17em}}year⇒1100+110=1210\\ 3rd\text{\hspace{0.17em}\hspace{0.17em}}year⇒1210+121=1331\end{array}$  +91

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