Correct Answer: 37/11 days
Explanation:
A's 1 days 's work = 1/8
B ' s 1 days ' s = 1/10
C ' s day 's work = 1/20
(A + B + C)'s 1 days 's work = 1/8 + 1/10 + 1/20 = (5 + 4 + 2)/40 = 11/40
∴ (A + B + C ) can finish the work in 40/11 days or 3 7/11 days.
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