Re: simple stats problem

Digital Puer <digital_puer@xxxxxxxxxxx> writes:

Hi, I've been trying to figure out this problem I got on an interview,
but I haven't been able to get a clear answer.

Suppose I have a room of N computers. Suppose each computer
fails at a rate of once every 14 days.

Now what is the probably that at least one of them fails?

1, if no time limit is specified.

I'm thinking it's 1 - prob(none of them fail). But then how do I
figure that out?

And if the question is what is the probably that at least one of them
fails, does that necessarily mean "out of those 14 days"? I didn't
have any other info than that.

If they wanted to ask the probability that at least one failed in those
14 days, or in some other specific time interval, then they should have
said so.
--
Robert Israel israel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada
.

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