A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :
Options:
A. 1/6 B.1/8 C.1/10 D. 8/15
Answer: D
Explanation:
Options:
A. 1/6 B.1/8 C.1/10 D. 8/15
Answer: D
Explanation:
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