MagnusMentula
MagnusMentula MagnusMentula
  • 07-08-2020
  • Mathematics
contestada

What does "C" represent and how do you evaluate this?

What does C represent and how do you evaluate this class=

Respuesta :

salatulmaghrib
salatulmaghrib salatulmaghrib
  • 07-08-2020
It represents 'combinations'.

It means that you have 9 items, and you want to count the combinations of 7 items.

The answer is:
9! / ((9-7)! * (7!))
= 9! / (2! * 7!)
= 9*8/2
= 36
Answer Link
konrad509
konrad509 konrad509
  • 07-08-2020

[tex]_9C_7=\dfrac{9!}{7!2!}=\dfrac{8\cdot9}{2}=36[/tex]

Answer Link

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