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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