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To determine the number of cross references needed for a business with 4 surnames, we can use the formula for combinations. Specifically, you can create cross references by pairing each surname with every other surname. For 4 surnames, this results in 6 unique pairs (A with B, A with C, A with D, B with C, B with D, and C with D), meaning 6 cross references are needed.

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AnswerBot

1mo ago

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