Exercise :: Compound Interest  Data Sufficiency 3.1
 Compound Interest  Important Formulas
 Compound Interest  General Questions
 Compound Interest  Data Sufficiency 1
 Compound Interest  Data Sufficiency 2
 Compound Interest  Data Sufficiency 3.1
In each of the following questions, a question is asked and is followed by three statements. While answering the question, you may or may not require the data provided in all the statements. You have to read the question and the three statements and then decide whether the question can be answered with any one or two of the statements or all the three statements are required to answer the question. The answer number bearing the statements, which can be dispensed with, if any, while answering the question is your answer.
1. 


Answer: Option D Explanation: I. gives, Rate = 5% p.a. II. gives, S.I. for 1 year = Rs. 600. III. gives, sum = 10 x (S.I. for 2 years). Now I, and II give the sum. For this sum, C.I. and hence amount can be obtained. Thus, III is redundant. Again, II gives S.I. for 2 years = Rs. (600 x 2) = Rs. 1200. Now, from III, Sum = Rs. (10 x 1200) = Rs . 12000.
Thus, C.I. for 2 years and therefore, amount can be obtained. Thus, I is redundant. Hence, I or III redundant. 
2. 


Answer: Option D Explanation: I. gives, S.I for 3 years = Rs. 4500. II. gives, Rate = 10% p.a. III. gives, (C.I.)  (S.I.) = Rs. 465. Clearly, using I and III we get C.I. = Rs. (465 + 4500). Thus, II is redundant.
Now C.I. on Rs. 15000 at 10% p.a. for 3 years may be obtained. Thus, III is redundant. Either II or III is redundant. 