What is the maximum amount of ground coffee I can use for carafe brewing?

The maximum capacity for regular ground coffee is 15 tablespoons and 12 tablespoons for decaf. Exceeding this amount may cause overflow. It is recommended to use 1 tablespoon of ground coffee per cup. (Page 3)

From the official Keurig K-Duo Dual Brew Coffee Maker manual, page 3

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