On a wintry day, a salesman randomly chooses to drive to 2 of the following three cities: Los Angeles, San Francisco, and Sacramento.
The probability of rain on a wintry day is:
1/3 in San Francisco
1/4 in Sacramento
1/6 in Los Angeles
He returned home with wet clothes.
What is the probability he had visited Los Angeles?
Your answer is correct for the case the salesman has visited only 1 of the 3 cities (2/9).
The answer to my question should be 0.621.
My problem is that I don't how to reach it.
(Sorry for my English)