3. Probability: Probability
Law of Total Probability
Partition
A partition of the sample space for an experiment is any collection of mutually exclusive events whose union equals .
This means that every possible outcome of the experiment is an element of one and only one of the events.
Law of Total Probability
Given a partition and some other event , it is possible to write as:
Then
provided for each .
This is called the Law of Total Probability.
Your parents will travel on vacation in the summer to either Spain, Italy, France, or Croatia with respective probabilities .
Depending on which country they choose, you will join them with respective probabilities .
What is the probability that you will join your parents on vacation this summer? Round your answer to decimal places.
Define the following events:
- Your parents choose Spain
- Your parents choose Italy
- Your parents choose France
- Your parents choose Croatia
- You join your parents
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