Find the annual income derived by investing $ 6800 in 60% stock at 136.  Choose the correct choice.
A) 550
B) 3000
C) 250
D) 300
E) 400

Rationale: "by investing $ 136 , income obtained = $ 60 . by investing $ 6800 , income obtained = $ [ ( 60 / 136 ) * 6800 ] = $ 3000 . answer b ."
Answer: B