5/6 of the lights bulbs on a string of all red christmas lights will light up. Then Fred replaced 1/2 of the dead bulbs with green bulbs. What fraction of the lights that light up are green?	Answers.
A) 1/11  B) 1/6  C) 2/11  D) 1/12  E) 1/8
If there are 12 bulbs on the string of lights, that would mean 10 of the lights lit red and 2 of the bulbs were dead. If Fred replaced half of the dead light bulbs with green light bulbs, he would have replaced 1 dead light bulb with a green light bulb. This light bulb would be 1 of 11 functioning light bulbs or 1/11. (1/11nswer: 1/11)
<result>A</result>
5/6 of the lights bulbs on a string of all red christmas lights will light up. Then Fred replaced 1/2 of the dead bulbs with green bulbs. What fraction of the lights that light up are green?