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If 25 lines are drawn in a plane such that no two of them

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Concentration: Statistics
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If 25 lines are drawn in a plane such that no two of them  [#permalink]

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New post 18 Apr 2017, 07:10
D
Each line will intersect all the other lines
1 line - 24 intersections
Each consecutive line will also have 24 intersections, however we exclude one for because of the repetition
2 line - 23
3 line - 22
...
25 line - 0 intersections
As the numbers are consecutive, the average is equal to the the median and is equal 12. The total number of intersections are 25*12 =300
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Re: If 25 lines are drawn in a plane such that no two of them  [#permalink]

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New post 19 Apr 2018, 06:20
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If 25 lines are drawn in a plane such that no two of them &nbs [#permalink] 19 Apr 2018, 06:20

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