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In a school, 50% of students are younger of students younger than 10, 1/2 are 10 years old and 1/10 are older than 10 but younger than 12, the remaining of students are 12 years or older. How many students
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In a school, 50% of students are younger of students younger than 10, 1/2 are 10 years old and 1/10 are older than 10 but younger than 12, the remaining of students are 12 years or older. How many students are 10 years old?

User Marilin
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Answer:

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User Bernhard Kausler
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