A can do a work in 3 days. B can do the same work in 6 days and C can do the same work in 7 days. If they work together, in how many days will they take to complete the work?
a. 11/10 Days
b. 15/16 Days
c. 14/9 Days
d. 16/7 Days
ANSWER: 14/9 Days
Explanation:
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