perplexus.info :: Probability : Disk Toss on a Grid

Disk Toss on a Grid (Posted on 2016-07-08)

A disk that is 1 cm in diameter is tossed onto a 6x6 grid of squares with each square having side length 1.25 cm.

A disk is in a winning position if no part of it touches or crosses a grid line- otherwise it is in a losing position

The disk is tossed and it lands in a random position so that no part of it is outside the grid.

What is the probability that the disk is in a winning position?

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re(2): Three answers (spoiler)

Comment 4 of 4 |

(In reply to re: Three answers (spoiler) by Charlie)

Right you are Charlie. I will fix my answer also.

Posted by Steve Herman on 2016-07-08 20:59:49

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