Q. 335.0( 3 Votes )
The number of tri A. 105
B. 15
C. 175
D. 185
Answer :
Formula:- (i) nCr
Triangle are form by 3 point
Total number of triangle formed
Triangle formed by vertices from a set of 12 points and seven point
12C3-7C3
=220-35
=185
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