SOLUTION: Some One please help to solve this
There are 12 points in a plane of which 5 are collinear. The number of triangle is
The answer Is 210
I don’t know how to do ???? please Ex
Algebra ->
Permutations
-> SOLUTION: Some One please help to solve this
There are 12 points in a plane of which 5 are collinear. The number of triangle is
The answer Is 210
I don’t know how to do ???? please Ex
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Question 486760: Some One please help to solve this
There are 12 points in a plane of which 5 are collinear. The number of triangle is
The answer Is 210
I don’t know how to do ???? please Explain
You can put this solution on YOUR website!
To form a triangle we have to choose only 3 points in a plane but, these must not
collinear. So, firstly we will find total no. of ways to select 3 points from 12
points and then subtract the number of triangle that will form by using only 5
collinear points.
12C3 - 5C3 = 220- 10 = 210
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