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Let the efficiency of a boy = '5x' units/dayThen, efficiency of a man = 5x X 1.6 = '8x' units/daySo, combined efficiency of 2 boys and 1 man = 5x X 2 + 8x = '18x' units/daySo, total work = 18x X 15 = 270x unitsSo, number of boys required to complete the work in 13.5 days = (270x ÷ 13.5) ÷ 5x = 4
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A group decision-making process which forbids negative feedback on any suggested alternative by any group member until all members have presented alter...
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