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Appropriate statistical summary

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Your customers have been divided into 3 groups. The first group represents 15% of customers, and these customers spent an average of $29.76 last year. The second group represents 29% of customers who spent $58.03 on average. Within the third group, average spending was $75.10. You are interested in finding the average spending per customer across all groups. What is the appropriate statistical summary here, to be computed based on this information?

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Identifies and calculates appropriate statistical summary.

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Your customers have been divided into 3 groups.  The first group represents 15% of customers, and these customers spent an average of $29.76 last year.  The second group represents 29% of customers who spent $58.03 on ...

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