A and B complete a work in 8 days. A alone can do it in 12 days. If both together can do the work in how many days?  Options.
A) 4.8 days B) 3.8 days C) 3.65 days D) 3.77 days E) 5.75 days

Rationale: "1 / 8 + 1 / 12 = 5 / 24 24 / 5 = 4.8 days answer : a"
Answer: A