odds of x happening is 1 in 1000: find odds of x >=1 in 1000

JMSNMSJTS

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The odds of x happening is 1 in 1000. If 1000 attempts are made, what are the odds x will happen at least once? Please include how you got your answer. Thanks in advance.
 
Re: odds of x happening

odds of x happening = 1/1000
in 1000 tries what is the probability x happens at least 1?
this is the same as saying , "1- the chance that x never happens?
the chance x never happens is [999/1000]^1000
probability=1-[999/1000]^1000

Arthur
 
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