Math  Counting
posted by Iah .
Hi. The question is:
A, B, C, and D are nodes on a computer network. There are two paths between A and C, two between B and D, three between A and B and four between C and D. Along how many routes can a message from A to D be sent?
My thinking:
I came up with two ways a message can go from A to D.
A to C, C to D > 2 + 4 > 6 paths
A to B, B to D > 3 + 2 > 5 paths
Do I use the addition or multiplication principle for this problem?
Thanks!
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