Smita can finish a work in 12 days and Sam can finish the same work in 9 days. After working together for 4 days they both leave the job. What is the fraction of unfinished work?
A. 1/2
B. 7/9
C. 2/9
D. 1/4
Answer:C
Smita can finish a work in 12 days and Sam can finish the same work in 9 days. After working together for 4 days they both leave the job. What is the fraction of unfinished work?
A. 1/2 B. 7/9 C. 2/9 D. 1/4