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number of balls withdrawn. calculate $p (x < )$, ie the probability that none of the numbers is greater than $ $. i would like to understand why doing $ ^ $ is incorrect. the answer is $ − ^ $. probability share | cite | improve this question edited hours ago helen asked hours ago helen helen bronze badges
example, this counts results like $( , , , )$ and $( , , , )$. to do this, we find the opposite of what we want (all four balls are greater than or equal to $ $), then subtract this from $ $. this yields: $$ - ( )^ $$ share | cite | improve this answer answered hours ago adriano adriano . k gold badges...
https://math.stackexchange.com/questions/3494523/calculate-p-x-3