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There are eight girls among whom two are sisters, all of them
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There are eight girls among whom two are sisters, all of them are so to sit on a round table. Find the probability that the two sisters do not sit together.

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There are eight girls among whom two are sisters, all of them are so to sit on a round table. Find the probability that the two sisters do not sit together.
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Question Text
There are eight girls among whom two are sisters, all of them are so to sit on a round table. Find the probability that the two sisters do not sit together.