A and B complete a work in 8 days. A alone can do it in 14 days. If both together can do the work in how many days?
Choose one:
A) 5 days B) 8 days C) 6 days D) 3.15 days E) 2.75 days

Rationale: "1 / 8 + 1 / 14 = 11 / 56 56 / 11 = 5 days answer : a"
Answer: A