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21.
The banker's gain of a certain sum due 2 years hence at 10% per annum is Rs. 24. The present worth is:
  • A.
    Rs. 480
  • C.
    Rs. 600
  • B.
    Rs. 520
  • D.
    Rs. 960
  • Answer & Explanation
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Answer : [C]
Explanation :
T.D. =  
B.G. x 100
Rate x Time
   = Rs.  
24 x 100
10 x 2
   = Rs. 120.
 
  P.W. =
100 x T.D.
Rate x Time
 = Rs.  
100 x 120
10 x 2
   = Rs. 600
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22.
The banker’s discount of a certain sum of money is Rs. 72 and the true discount on the same sum for the same time is Rs. 60. The sum due is:
  • A.
    Rs. 360
  • C.
    Rs. 540
  • B.
    Rs. 432
  • D.
    Rs. 1080
  • Answer & Explanation
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Answer : [A]
Explanation :
Sum =
B.D. x T.D.
B.D. - T.D.
 = Rs.  
72 x 60
72 - 60
   = Rs.  
72 x 60
12
   = Rs. 360.
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23.
The banker's gain on a sum due 3 years hence at 12% per annum is Rs. 270. The banker's discount is
  • A.
    Rs. 960
  • C.
    Rs. 1020
  • B.
    Rs. 840
  • D.
    Rs. 760
  • Answer & Explanation
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Answer : [C]
Explanation :
T.D. =  
B.G. x 100
R x T
   = Rs.  
270 x 100
12 x 3
       
  = Rs. 750  
 
  B.D. = Rs.(750 + 270) = Rs. 1020.  
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24.
The banker's gain on a bill due 1 year hence at 12% per annum is Rs. 6. The true discount is
  • A.
    Rs. 72
  • C.
    Rs. 54
  • B.
    Rs. 36
  • D.
    Rs. 50
  • Answer & Explanation
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Answer : [D]
Explanation :
T.D. =
B.G. x 100
R x T
=  
6 x 100
12 x 1
   = Rs. 50.
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25.
The banker's discount on a bill due 4 months hence at 15% is Rs. 420. The true discount is:
  • A.
    Rs. 400
  • C.
    Rs. 480
  • B.
    Rs. 360
  • D.
    Rs. 320
  • Answer & Explanation
  • Report
Answer : [A]
Explanation :
T.D. = 
B.D. x 100
100 + (R x T)
     
= Rs.   
420 x 100
100 +    15 x
1
3
 
   
= Rs.   
420 x 100
105
     
  = Rs. 400.    
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