there are there are 20 non collinear points in a plane how many (¡)straight lines(¡¡) Triangles can be drawn by joining these points?
Answers
Answered by
6
hi there !!
here is ur answer
formula to be used
n C r = n!/r!(n-r)!
no to straight lines can be drawn
= 20 C 2
and no of triangle can be drawn
= 20 C 3
hope helped...
here is ur answer
formula to be used
n C r = n!/r!(n-r)!
no to straight lines can be drawn
= 20 C 2
and no of triangle can be drawn
= 20 C 3
hope helped...
Similar questions