Which is better investment?
(I) 7(1/2) % stock at 105 or
(II) 6(1/2) % at 94.  Choose the correct option.
A) I B) II C) Both D) Cannot Determine E) Data Insufficient
Let the investment in each case be $ (105*94).   Case I : 7(1/2) 5 stock at 105:   On investing $ 105, income = $ (15/2).   On investing $ (105*94), income = $ [(15/2)*(1/105)*105*94= 
<gadget id="calculator">(15/2)*(1/105)*105*94</gadget>
<output>705</output>
$705.   Case II : 6(1/2) % stock at 94:   On investing $ 94, income= $ (13/2).   On investing $ (105*94), income = $ [(13/2)*(1/94)*105*94]   = $ 682.5.   Clearly, the income from 7(1/2) % stock at 105 is more.   Hence, the investment in 7(1/2) % stock at 105 is better.   Inswer I.
<result>A</result>
Which is better investment?
(I) 7(1/2) % stock at 105 or
(II) 6(1/2) % at 94.