Routes through City Streets Refer to the map in Fig. 3. The number of shortest routes from A to B is
(a) Observe that the number of shortest routes from A to D is
(b) Observe that the number of shortest routes from A to E is
(c) By looking at Fig. 3, explain why
(d) Calculate the values in part (c) to verify the equality.
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Finite Mathematics & Its Applications (12th Edition)
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