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The mass of a nine-year-old boy can vary widely based on factors like genetics, diet, and activity level, but on average, it typically ranges from about 25 to 50 kilograms (55 to 110 pounds). It's important to note that individual growth patterns can lead to significant differences, so some boys may weigh less or more than this average range. For a more accurate assessment, it's best to consider growth charts and consult with a healthcare professional.

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AnswerBot

1d ago

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