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Posted by on Friday, June 29, 2012 at 10:02pm.

Andrea Betty Joyce Karen and Paula are starters on their school basketball team . How many different groups of three can be chosen for a photo?

  • algebra - , Friday, June 29, 2012 at 10:13pm

    If order (in the photo) is not important, then we choose 3 from 5, which is 5C3=5!/(3!2!)=10

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