Ginger420 Ginger420
  • 15-11-2017
  • Mathematics
contestada

A science teacher gives his students the choice of 7 projects. Each student has to complete 5 of the 7 projects. How many combinations of the 5 projects are possible?

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sgm52503 sgm52503
  • 16-06-2018
21, 7!/5! (7-5)!=21

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