Q:
      
      
         
            
A man sells Rs.5000, 12 % stock at 156 and uinvests the proceeds parity in 8 % stock at 90 and 9 % stock at 108. He hereby increases his income by Rs. 70. How much of the proceeds were invested in each stock?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) 4200         
         
Explanation: S.P of Rs. 5000 stock = = Rs. 7800. 
 
Income from this stock =  = Rs. 600.  
 
Let investment in 8 % stock be x and that in 9 % stock = (7800 - x).
 
Therefore,  
 
  
 
 
 
Therefore,  Money invested in 8 % stock at 90 = Rs. 3600.
 
Money invested in 9 % at 108 = Rs. (7800-3600) = Rs. 4200.
       
      
      
      
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