If Ramesh wants to earn equal profit by selling shares of NTPC and Unitech, how much more shares of NTPC than Unitech should be sold?
Let the total number of shares for the month of August 2007 be x and the total profit earned in that month be Rs. Y.
the difference in profit is 
= Rs. 
Selling 20x/100 shares of Unitech earned a profit of Rs.
Selling 10x/100 shares of NTPC earned a profit of Rs.
To earned a profit of Rs. , he should have sold 
more NTPC shares.
So required percentage 
= 
= 66.67%. hence (C)
Alternately:
we can take numbers to calculate: taking data from the first question of this caselet. we have a total of 100 shares and a total profit of Rs. 600.
For NTPC: number of shares=10, profit earned=90
For Unitech: Number of shares=20 , Profit earned=150.
By selling NTPC shares we have to earn Rs.150, then No. of shares sold should be16.66. i.e an increase of 66.66% over 10 shares initially.
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