Aptitude - Compound Interest - Discussion

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Q.

What is the rate of interest p.c.p.a.? I. An amount doubles itself in 5 years on simple interest. II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400. III. Simple interest earned per annum is Rs. 2000.  .                          
A. I only B. II and III only
C. I only or II and III only D. All I, II and III

Answer: Option C
Explaination:

 


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