Three public-investment alternatives with the same service life are available: Al, A2, and A3. Their respective total benefits, costs, and first costs are given in present worth as follows:
TABLE PI6.10

Assuming no do-nothing alternative, which project would you select on the basis of the benefit-cost ratio BC(i) on incremental investment?

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Proposals Present worth AI 100 400 100 A2 300 700 200 АЗ 200 500 150