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mathematicsprinted 143 · PDF 144
165 pagesrevision 46935
printed 143 · PDF 144
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143
Summary
Probability Values: Can be expressed as fractions, decimals, or percentages.
Key Concepts: Single event probabilities, the complement of an event, and the use of data
representations to derive probabilities.
(make sure to revise the signs for intersection, union, complement and do not mix
them up as it is one of the most common mistakes made in the exams)
C8.2 Relative and Expected Frequencies
1. Understanding Relative Frequency as an Estimate of Probability
Example:
If you spin a spinner 50 times and it lands on red 15 times:
Relative Frequency of Red = 15/50 = 0.3 (or30%)