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MGSM / 詹姆斯正在数他的宝可梦卡牌。他有 30 张火系、20 张草系和 40 张水系。如果他丢失了 8 张水系且购买了 14 张草系,一张随机选择的卡牌为水系的几率是多…

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詹姆斯正在数他的宝可梦卡牌。他有 30 张火系、20 张草系和 40 张水系。如果他丢失了 8 张水系且购买了 14 张草系,一张随机选择的卡牌为水系的几率是多少(四舍五入到最接近的整数)?

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