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The total number of possible outcomes is 6*5*4*3*2*1 = 720.
(the product of 6 sequential integer numbers starting from 6 in descending order).
It is because any of 6 answers can be in the first position,
any of remaining 5 answers can be in the second position,
. . . and so on . . .
It is the space of events.
Of these possible outcomes, ONLY ONE does match (!).
THEREFORE, the probability under the problem's question is = 0.00139. ANSWER
Solved and explained.
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