A, B and C can finish a work in 20, 25, and 30 days, respectively. They start working together but \(B\) quits after working for 3 days. In how many days from the start shall the work be completed?
Calculate the combined rate of work for A, B, and C for the first 3 days, then A and C's combined work rate for the remaining days. Total work days equal approximately 10.2 or 10 \(\frac{1}{5}\) days.