x does (1)/(4) of a job in 6 days, y co...

x does `(1)/(4)` of a job in 6 days, y completes rest of the job in 12 days. Then x and y could completer the job together in :

`9 3/5` days

`7 1/3` days

9 days

`8 1/8` days

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2014 TIER-II PAPER(18)
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