Jane and Mike are planning to go on a two-week vacation next summer. They have selected six vacation resorts, two of which are in Canada and remaining four are in Caribbean countries. Jane prefers going to a Canadian resort, and Mike prefers to vacation in one of the Caribbean countries. After much argument, they decide that they will put six balls of the same size, each marked with one of the six vacation resorts, in a hat. Then they will ask their 8-year-old son to randomly choose one ball from these six balls. What is the probability that a vacation resort from the Caribbean countries is selected? Is this an example of the classical approach, relative frequency approach, or the subjective probability approach? Explain your answer.
Do these probabilities add to 1.0? If yes, why?