Binomial probability function

  • Thread starter g.lemaitre
  • Start date
  • #1
267
1

Homework Statement



Screenshot2012-10-02at22226AM.png


Homework Equations


The Attempt at a Solution



do you see where it says 5 over 2 = 10 and 5 over 3 = 10. How? I don't get what they're doing.
 

Answers and Replies

  • #2
267
1
never mind i got it.

n!/(x!(n-x)!)
 

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