P can complete a piece of work in 8 days, Q in 10 days and R in 12 days. Q and R together worked for 3 days, then R left the work and P replaced him. In how many days will the remaining work be completed?
a) 2 days b) 4 days c) 3 days d) 1 day e) 5 days
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Answer:try to do it by yourself
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