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OpenStudy (anonymous):
on the shelf there are 4 mathematic books and 8 english books. what is the probability that all the mathematics books will not be together? (ans: 54/55) please explain! i dont understand thos topic very well.
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OpenStudy (baldymcgee6):
1 - the probability of the math books being together = the probability of the math books NOT being together
OpenStudy (baldymcgee6):
_ _ _ _ _ _ _ _ _ _ _ _
OpenStudy (baldymcgee6):
there are 12 spots that need to be filled
OpenStudy (anonymous):
and then?
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