16.A can finish a work in 10 days, B can finish the same work in 15 days, and C can finish it in 30 days. All three start working together, but after some days A leaves the job, then after one day B also left the job. C completes the remaining job in 3 days. Find the number of working days of B. 1 point A. 4 days B. 5 days C. 6 days D. 7 days
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5 days.
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Answer: 5 days. vbgggjee
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