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Three numbers are chosen at random without replacement from {1, 2,..., 10}.

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Three numbers are chosen at random without replacement from {1, 2,..., 10}. The probability that the minimum of the chosen number is 3, or their maximum is 7, is ... .

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Let, E1 be the event getting minimum number 3 and E2 be the event getting maximum number 7. 

Then, P(E1) = P (getting one number 3 and other two from numbers 4 to 10)

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