Multiple Choice Questions on A lends 20 of sum at 20 p a 25 of sum at 10 p a and the remaining 20 sum at 15 p a rate of interest ........... for CDS Exam Preparation

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Multiple Choice Questions

A lends 20 of sum at 20 p a 25 of sum at 10 p a and the remaining 20 sum at 15 p a rate of interest ...........

Quantitative Aptitude (CDS) Simple Interest
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    A lends 20%of sum at 20% p.a. 25% of sum at 10% p.a. and the remaining 20% sum at 15% p.a. rate of interest. What would be the rate of interest, if the interest is calculated on the whole sum?

     

    10.% p.a.
     

    Incorrect Answer

    11.4% p.a. 
     

    Incorrect Answer

    7.5% p.a. 
      8% p.a

    Incorrect Answer

    8% p.a

    Correct Answer
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    Explanation:


     Let total sum=Rs. 100

     Interest on first part =(20 × 20 × 1)/100= Rs.4

     Interest on second part =(10× 10 × 1)0100 = Rs.1

     Interest on third part =(20× 15 × 1)/100= Rs.3 

    Total interest = 4+3+1= 8%

     Rate of interest = 8%     

    By: bhavesh kumar singh
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