Imagine that we have 2 parallel lines and there are 5 points on each line.
How many triangles can we make by them?
1- 100
2- 200
3- 150
4- 300
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Imagine that we have 2 parallel lines and there are 5 points on each line.
How many triangles can we make by them?
1- 100
2- 200
3- 150
4- 300
You need to be a member of MyEnglishClub to add comments!
Replies
2* ( 5! / (2! * (5-2)! ) ) * ( 5! / (1! * (5-1)! ) ) = 100
A triangle has three points. We choose two from one line and one from the other. Then we choose one point from the first line and two points from the second.
Thanks for the puzzle, dear Sahar.
I enjoyed.
:)
Oh!!
What I'm seeing!
The old question is alive again!
Well done dear Zahar!
You are also very good at probability.
It was the exact answer.
Good job, dear!
W0W!!
Sue!
Let ,at least, my writtings' ink be dried!!
Well done, dear!
You are...
You are...
Oh!
My God!
You are fantastic!