Q5 PERMUTATION AND COMBINATION
The figure below shows the network connecting cities A, B, C, D, E and F. The arrows indicate permissible direction of travel. What is the number of distinct paths from A to F?
ADEF, ABCF, ABF, ADCF, ADCEF,
ABDEF, ABEF, ABCEF, ABDCF, ABDCEF 10 ways.
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