X and Y together can do a piece of work in 18 days. When Y and Z work together they can do the work in 12 days But when X and Z work together, they can do the same piece of work in 24 days. How many days will it take to complete the samework if all of them work together?
A 9
B 6
C 7.5
D 8
Solution
Correct Answer: Option E
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