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2. Calculating the Probability of a Single Event
Formula:
Example: If there are 3 red counters and 7 blue counters in a bag, the probability of
picking a red counter is:
P(Red) = 3/10 = 0.3 = 30%
3. Probability of an Event Not Occurring
Complement Rule:
P(Not A)=1−P(A)
Example:
If the probability that a counter is blue is P(Blue) = 0.8 then:
P(Not Blue) = 1−0.8 = 0.2(or 20%)
4. Using Information from Tables, Graphs, and Venn Diagrams
Tables: You can use tables to determine probabilities based on given data.
Graphs: Probability can also be visualized in graphical representations like bar charts.
Venn Diagrams: Used for two sets, showing the relationship between different probabilities.