Find the annual income derived by investing $ 6800 in 10% stock at 136.  Choose the correct choice from the following.
A) 550  B) 500  C) 250  D) 300  E) 400
By investing $ 136, income obtained = $ 10.   By investing $ 6800, income obtained = $ [(10/136)*6800= 
<gadget id="calculator">(10/136)*6800</gadget>
<output>500</output>
$ 500.   Answer 500.
<result>B</result>
Find the annual income derived by investing $ 6800 in 10% stock at 136.