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Alex can do a work in 15 days and Vinod in 12 days. If they work on it together for 4 days, the fraction of work that is left is | |
A. | 3/5 [Wrong Answer] |
B. | 4/7 [Wrong Answer] |
C. | 2/5 [Correct Answer] |
D. | 1/4 [Wrong Answer] |