Assume that Wyoming is shaded exactly like a rectangle, and that a person's location in Wyoming is 0 ‰¤ X ‰¤ 350 and 0 ‰¤ Y ‰¤ 276. Assume that the joint density of a person's location is constant on this region.
Assume that 1-80 runs perfectly straight along the east-to-west line Y = 30, as in Figure. Given that the person is located on 1-80, what is the conditional probability that he is within 10 miles of a State border? (He could be either west or east; please take both into account.)

Transcribed Image Text:

250 200 150 100 50 100 200 300