Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total number of pictures.
Solution Stats
Problem Comments
-
1 Comment
Pritesh Shah
on 2 Aug 2014
Good One:))
Solution Comments
-
1 Comment
Vishal
on 30 Sep 2014
Combination.......good one!
Recent Solvers291
Suggested Problems
-
1822 Solvers
-
How long is the longest prime diagonal?
262 Solvers
-
424 Solvers
-
265 Solvers
-
172 Solvers
More from this Author100
Tags
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)