medium · GMAT Quant
**Harbor Square case**
A single invoice is classified as either domestic, international, or internal. Exactly one classification is assigned.
Which pair of events is mutually exclusive?
- The invoice is international; the invoice is not domestic.
- The invoice is internal; the invoice has a classification.
- The invoice is not domestic; the invoice is international.
- The invoice is domestic; the invoice is international.
- The invoice is domestic; the invoice is not internal.
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