c) There are three train tracks from village X to village Y and four train tracks from village Y to village Z. i) How many ways to travel from village X to village Z via village Y by train? ii) How many different round-trip routes are there from village X to Y to Z to Y and back to X in which the same road cannot be travelled twice?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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c) There are three train tracks from village X to village Y and four train tracks
from village Y to village Z.
i) How many ways to travel from village X to village Z via village Y by
train?
ii)
How many different round-trip routes are there from village X to Y to
Z to Y and back to X in which the same road cannot be travelled
twice?
Transcribed Image Text:c) There are three train tracks from village X to village Y and four train tracks from village Y to village Z. i) How many ways to travel from village X to village Z via village Y by train? ii) How many different round-trip routes are there from village X to Y to Z to Y and back to X in which the same road cannot be travelled twice?
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