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     EduGorilla 
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    X, Y and Z together cleaned the pool in 3 days. X alone clean it in 9 days and Y alone in 6 days. How many days will Z take to clean the pool alone?

    Options :-

    1. 21
    2. 16
    3. 12
    4. 18
    5. 15
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Reply To: X, Y and Z together cleaned the pool in 3 days. X alone clean it in 9 days and Y alone in 6 days. Ho….
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