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A number of points are marked on a plane and are connected

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Senior Manager
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A number of points are marked on a plane and are connected [#permalink] New post 30 Jan 2004, 12:34
A number of points are marked on a plane and are connected pairwise by a line segment. If the total number of line segment is 15, how many points are marked on the plane?

a.5
b.6
c.8
d.7
e. :fist:
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 [#permalink] New post 04 Feb 2004, 01:57
......6 Points
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 [#permalink] New post 04 Feb 2004, 10:12
The numbers of lines are 15 and points are 2. I know 6C2 = 15 and the number of points are 6.

How did you come up with the number 6 . is is something like
xC2 = 15. Can you please explain your approach; Or you just did backsolving to comeup with the number 6
  [#permalink] 04 Feb 2004, 10:12
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A number of points are marked on a plane and are connected

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