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Mathematics
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OpenStudy (anonymous):
Seven schools compete in a county math competition. If 3 of those schools will be chosen to compete at the regional level how many possible groupings exist?
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OpenStudy (bahrom7893):
7C3
OpenStudy (bahrom7893):
7C3=7!/((7-3!)*3!)
OpenStudy (ajprincess):
|dw:1332042101040:dw|
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