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There are 25 points in a plane , of which 10 are on the same line.Of the rest,no 3 collinear and no 2 are collinear with any of the 1st 10 points.find the number of different straight lines that can be formed by joining these points

There are 25 points in a plane , of which 10 are on the same line.Of the rest,no 3 collinear and no 2 are collinear with any of the 1st 10 points.find the number of different straight lines that can be formed by joining these points


 


 

Grade:11

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear rahul,

The required number of ways= 25C2- 10C2

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Sagar Singh

B.Tech, IIT Delhi

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