A can do a work in 6 days , B can do a work in 8 days and C can do it in 12 days. B left work after 1 day. For how many number of days should A and C should work together to complete the remaining work ?	Choose one
A) 1/7  B) 2/7  C) 3/7  D) 4/7  E) 5/7
b work 1/8 * 1=1/8   remaining work =1-1/8=7/8   a and c work together =1/6+1/12=3/12=1/4   take reciprocal 7/8 * remaining work =8/7 *1/4=2/7   ANSWER:2/7
<result>B</result>
A can do a work in 6 days , B can do a work in 8 days and C can do it in 12 days. B left work after 1 day. For how many number of days should A and C should work together to complete the remaining work ?