pds41: It always makes me laugh when people believe that having two unrelated events occur at the same time is any less likely than having two unrelated events occur at different yet specified times. The probabilities are the same.
iippo: Depending on what you mean by "the probabilities are the same" youve either understood or totally not understood probabilities.
Are you talking about "computer catches on fire" = probability nro 1 & "phone rings" = probability nro 2
...or "computer catches on fire and phone rings" = probability nro 3.
Individually chances of 1 and 2 separately do not chance at all. However if you are looking at case nro 3. that is both of them happening at the same time, its ofcourse way-way more unlikely opposed to them happening on different times.
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anyways, someone actually still uses landline?
I'm referring to that, yes. However, in probability terms, we're both correct - the chances of two things happening at the same time is equal to the probability of two things happening at
different yet determined times. So, the probability of your computer catching on fire at the same time as your phone rings is the same as the probability of your computer catching on fire 5 years, 2 months, 1 day, 12 hours and 15 seconds after your phone ringing.
It's merely a matter of perception - people are never surprised by the latter*, even though the probability is the same as the former.
Now, of course, you're also right in that the probability of the phone ringing at
any different time to the computer catching fire does approach one (one the assumption that the longer the computer is in existence, the closer to one the probability of it catching fire trends).
And yes - land lines are great. I even have a rotary telephone for it!
(* not strictly true, as I was pretty surprised when my PSU caught fire, but that's a different story).