camjoeland00 camjoeland00
  • 24-09-2020
  • Mathematics
contestada

Evaluate C(7,5) please

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helpmeaplease
helpmeaplease helpmeaplease
  • 24-09-2020

Answer: 21

Step-by-step explanation: This is a combination of 7 objects taken 5 at a time

nCr = n! / r! * (n - r)!

7C5 = 7! / (5! (7-5)!)

      = 7! /(5! 2!)

      = (7*6*5*4*3*2*1)

         -----------------------

         5*4*3*2*1  * 2*1

Canceling

     =    7*6/ (2*1)

     = 21

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miileyyxox
miileyyxox miileyyxox
  • 24-09-2020
21! Have a nice day and I hope this helped
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