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From the cars manufactured in 2005 indicated in the table, one car is to be selected at random from the model A cars and one car is to be selected at random from the model B cars.
Quantity A: The probability that the model A car selected will be one that required repairs in its first year
Quantity B: The probability that the model B car selected will be one that required repairs in its first year
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以上解析由 考满分老师提供。
