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Problem 14.65. You want to get from point A to point B and then back to...

Problem 14.65. You want to get from point A to point B and then back to A. To get from A to B there are 3 possible routes while to get from B to A there are 4 possible routes. The time, in minutes, to travel each route are:

Route

From A to B

From B to A

1

20

10

2

15

12

3

12

15

4

20
  1. How many ways are there to complete the round trip?
  2. If the routes are chosen randomly, both going and returning, find the pmf of the travel time.
Math   Advanced-Math   
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