Answer: The probability that she will visit Denver before San Francisco is
.
Explanation:
Given : The businesswoman randomly selects one of the possible itineraries and Denver and San Francisco are two of the cities that she plans to visit.
The possible itineraries = (First Denver and then San Francisco , First San Francisco and then Denver)
i.e. Total outcomes =2
If she visit Denver before San Francisco , then the favorable outcome = 1
Now , the probability that she will visit Denver before San Francisco =


Hence, the probability that she will visit Denver before San Francisco is
.