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April 21st, 2017, 11:24 AM  #1 
Newbie Joined: Apr 2017 From: Austria Posts: 3 Thanks: 0  Game  probability
Hi, Can someone help mw with a simple probability calculation in a game: What are the chances that a ball fall to a box on the bottom marked from A to R? Ball is dropped from the top and each step has 50% chance to go to left or right 
April 21st, 2017, 10:03 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 16,947 Thanks: 1255 
How many routes are there to a given box?

April 21st, 2017, 10:38 PM  #3 
Newbie Joined: Apr 2017 From: Austria Posts: 3 Thanks: 0  
April 22nd, 2017, 02:24 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 16,947 Thanks: 1255 
Try counting the routes, taking into count first 1 row, then two rows, etc., each time treating the count as though other rows don't exist. After you've done this a few times, you'll see how easy it is to count them in total, and it's only slight harder to do the counts for the individual boxes.

April 22nd, 2017, 04:16 AM  #5 
Newbie Joined: Apr 2017 From: Austria Posts: 3 Thanks: 0 
I thought there's a mathematical way to calculate it :\


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