a certain work can be done by a and b, b and c and a and c in 24/5, 48/7, 16/3 days respectively. find the number of days in which a. b. c can do the work respectively (a) 8, 12, 16 (c) 9, 15, 18 (b) 9, 12, 18 (d) 12, 16, 18
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