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Question
A and B can work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in :
4 days
6 days
8 days
12 days
ANSWER : 3
Descrption
<p>(A + B) 1 days work = 1/8</p> <p>(B + C) 1days work = 1/12</p> <p>(A + B + C) 1days work = 1/6</p> <p>(A + C) 1 days work = (2×1/6) - (1/8 + 1/12) = (1/3 - 5/24) = 3/24 = 1/8</p> <p>So, A and C together will do the work in 8 days </p>
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