3 years ago

Evaluate C(7,5) please

Mathematics

2 answers:

wel3 years ago

8 0

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

nikklg [1K]3 years ago

4 0

21! Have a nice day and I hope this helped

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