John can do work in 10 days, and Tom can do it in 15 days. If both work together for 3 days, what percentage of work will be left?
A. 20%
B. 50%
C. 10%
D. 40%
Answer:B
John can do work in 10 days, and Tom can do it in 15 days. If both work together for 3 days, what percentage of work will be left?
A. 20% B. 50% C. 10% D. 40%
Explanation: Let the total work be done by 30 units.