A set of 10 new questions in each round Question: ( 1 of 10 ) If Patricia can finish the work in 5 days and William can finish the same work in 9 days, then in how many days both can finish the work together? (A) 7 days (B) 3 3/14 days or 3.214 days (C) 14 days (D) 6 3/14 days or 6.214 days