Advertisements
Advertisements
प्रश्न
Find the number of triangles formed by joining 12 points if no three points are collinear
बेरीज
Advertisements
उत्तर
A triangle can be formed by selecting 3 non-collinear points.
We can choose 3 points from 12 points in
12C3 = `(12!)/(3!9!)`
= `(12 xx 11 xx 10 xx 9!)/(3 xx 2 xx 1 xx 9!)`
= 220 ways
∴ number of triangles = 220.
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
