On Wed, Apr 06, 2005 at 08:48:27PM -0400, [EMAIL PROTECTED] wrote: | All this talk of synthesized radios and channel conflicts reminded me of a | thread I started on RCGroups.com a while back. For those who are into math, | here's a probability puzzle: | | There are 50 R/C channels available on 72 MHz in the USA. Assuming all | channels are equally popular, everyone chose his channel at random, and | everyone is stuck on his own channel (no synthesizers), how many flyers with | 72 MHz radios have to show up at a field before the odds favor at least one | conflict?
9. If 9 people show up with random 72 mHz frequencies, the odds are 51% that there will be at least one conflict. It hardly qualifies as a puzzle anymore, since the math is so well understood. For more on the math involved, http://en.wikipedia.org/wiki/Birthday_paradox. Of course, in reality the channels are not random -- if somebody you fly with often has the same channel as you, somebody tends to change their channel. -- Doug McLaren, [EMAIL PROTECTED] "Life, loathe it or ignore it, you can't like it." -- Marvin, "Hitchhiker's Guide to the Galaxy" RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
