A can do a work in 3days. B can do in 6days. If both A&B are working together in how many days they can finish the work?
Select the correct option:
A) 1  B) 3  C) 2  D) 4  E) 5

Rationale: "1 day work of a = 1 / 3 1 day work of b = 1 / 6 1 day work of a & b = 1 / 3 + 1 / 6 = 1 / 2 a & b finish the work in 2 days answer is c"
Answer: C