Geometry

Question Analysis
This question involves using a frequency table to calculate the probability of a compound event.
The main focus is on correctly identifying the relevant categories (Medium and Extra - Large), summing up their frequencies, and then dividing by the total frequency to find the probability of the “or” event.

Key Concept Explanation
For mutually - exclusive events (a T - shirt can't be both Medium and Extra - Large at the same time), the probability of event or event is calculated as

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