One-seventh of the light switches produced by a certain factory are defective. Four-fifths of the defective switches are rejected and 1/15 of the non defective switches are rejected by mistake. If all the switches not rejected are sold, what percent of the switches sold by the factory are defective?	Choose the correct choice from the following answers:
A) 2.3%
B) 3.4%
C) 4.5%
D) 5.6%
E) 6.7%
1/7 of the switches are defective.   The defective switches that are not rejected are 1/5*1/7 = 1/35 = 3/105 of all switches.   The non defective switches that are sold are 6/7*14/15 = 84/105 of all switches.   The percent of switches sold that are defective is 3/87 which is about 3.4%.   The answer is 3.4%.
<result>B</result>
One-seventh of the light switches produced by a certain factory are defective. Four-fifths of the defective switches are rejected and 1/15 of the non defective switches are rejected by mistake. If all the switches not rejected are sold, what percent of the switches sold by the factory are defective?