The apparatuses of a 6-component system are to be randomly chosen from a box of 20 used
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The apparatuses of a “6-component system” are to be randomly chosen from a box of 20 used apparatuses. The resulting system will be functional if at least 4 of its 6 apparatuses are in working circumstances. If 5 of the 20 components in the box are not in working circumstances, what is the probability that the resulting system will be non-functional?
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