Hello! I will appreciate if anyone can help me with this problem. Thank you!:)

40% of vacationers going to rocky mt. region visit yellowstone park, 30% visit Tetons, 20% percent visit both. What is the probability that the vacationer visits yellowstone park or tetons?'


TS Contributor
As Outlier suggested you may use Venn's Diagram to help you to visualize the set relations. You may also use inclusion-exclusion principle to help.