A dealer of a certain brand of ecological refrigerators has 8 units for sale. Of them, 4 are of model A and the rest of

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answerhappygod
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A dealer of a certain brand of ecological refrigerators has 8 units for sale. Of them, 4 are of model A and the rest of

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A dealer of a certain brand of ecological refrigerators has 8 units for sale.
Of them, 4 are of model A and the rest of model B.
If 3 refrigerators are sold from among those available, obtain the probability that at most two are of model A.
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