A can complete the job in 6 hours and B can complete the same job in 3 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete  Choose the correct choice from the following answers.
A) 1/9	B) 3/10	C) 1/2	D) 5/6	E) 8/9
1/9=1/9
<result>A</result>
A can complete the job in 6 hours and B can complete the same job in 3 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete