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Font Dating Game  (View post)

Ricky [PersonRank 0]

Tuesday, February 12, 2008
12 years ago3,404 views

5+4+3+2=14?

mica [PersonRank 1]

12 years ago #

If I understand this right it should be 15.
6! / (2! * (6-2)!)

Tra [PersonRank 0]

12 years ago #

6C2
= 6! / (2!*(6-2)!)
= 6*5/2
=3*5
=15

Paul [PersonRank 0]

12 years ago #

c1c2 c1c3 c1c4 c1c5 c1c6
   c2c3 c2c4 c2c5 c2c6
   c3c4 c3c5 c3c6
   c4c5 c5c6

That's 14. Which one is missing?

Stephan Locher [PersonRank 9]

12 years ago #

Paul: c4c6 is missing and Ricky is missing +1 at the end.

Ionut Alex. Chitu [PersonRank 10]

12 years ago #

15 videos

6*5/2=15

More general, it's n*(n-1)/2 – the number of ways that 2 objects can be chosen from among n objects, regardless of order.

amanda paull [PersonRank 0]

12 years ago #

Actually, we shot 15 videos.
I think that adds up, doesn't it?
Thanks for playing!

-Amanda from Extensis

Ramibotros [PersonRank 10]

12 years ago #

en.wikipedia.org/wiki/Combinat ...

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