For those of you who want an explanation of Dave's answer, please refer to the diagram below.
| 0.5 in |-----------------| 0.5 in | xxxxxxxxxxxxxxxxxxxxxxx ----- xxxxxxxxxxxxxxxxxxxxxxx 0.5 in xxxxxxxxxxxxxxxxxxxxxxx ----- xxxxxx...................xxxxxx | xxxxxx...................xxxxxx | xxxxxx...................xxxxxx | xxxxxx...................xxxxxx | xxxxxxxxxxxxxxxxxxxxxxx ----- xxxxxxxxxxxxxxxxxxxxxxx 0.5 in xxxxxxxxxxxxxxxxxxxxxxx ----- Since the radius of the coin is 0.5 in, if the center of the coin falls in the x area, it will cross a grid line. So, probability of the coin not crossing the grid lines is area of dots / area of square = (1 inch square / 4 inch square) = 1/4 -- DK http://www.divye.in http://twitter.com/divyekapoor http://gplus.to/divyekapoor -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To view this discussion on the web visit https://groups.google.com/d/msg/algogeeks/-/osMGCscKC70J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
