A and B can do a work in 1 day, B and C in 2 days and C and A in 3 days. In how many days will the work be completed, if all three of them work together?
Choose the most appropriate option.
A) 12/11 B) 12/24 C) 13/16 D) 18/12 E) 14/23
One day work of A and B = 1/1= 
<gadget id="calculator">1/1</gadget>
<output>1</output>
1/2   One day work of C and A= 1/3   2(A + B + C) = 1/1+ 1/2 + 1/3   2(A + B + C) = 11/6   (A + B + C) = 11/12   Number of days required = 12/11 days.   12/11nswer: 12/11
<result>A</result>
A and B can do a work in 1 day, B and C in 2 days and C and A in 3 days. In how many days will the work be completed, if all three of them work together?