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Mathematics 15 Online
OpenStudy (anonymous):

Which of the following is a subset of the set A: {men between the ages of 20 and 30} {a 40 year old man} {adults between the ages of 20 and 25} {men between the ages of 25 and 30} {men over 30}

OpenStudy (anonymous):

{men between the ages of 25 and 30} is a subset of {men between the ages of 20 and 30}

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