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There are 6 roads between A & B and 4 ro...

There are 6 roads between A & B and 4 roads between B & C. (i) In how many ways can one drive from A to C by way of B? (ii) In how many ways can one drive from A to C and back to A, passing through B on both trips? (iiiI In how many ways can one drive the circular trip described in (ii) without using the same road more than once?

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