1.有4个零件,已知其中混入了一个不合格品品,现从中任取2个,求全是合格品的概率2.某射手射中10环的概率为0.28,射中9环的概率为0.24,射中8环的概率为0.19,求这个射手:(1)一次射中10环或9环
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![1.有4个零件,已知其中混入了一个不合格品品,现从中任取2个,求全是合格品的概率2.某射手射中10环的概率为0.28,射中9环的概率为0.24,射中8环的概率为0.19,求这个射手:(1)一次射中10环或9环](/uploads/image/z/11976603-51-3.jpg?t=1.%E6%9C%894%E4%B8%AA%E9%9B%B6%E4%BB%B6%2C%E5%B7%B2%E7%9F%A5%E5%85%B6%E4%B8%AD%E6%B7%B7%E5%85%A5%E4%BA%86%E4%B8%80%E4%B8%AA%E4%B8%8D%E5%90%88%E6%A0%BC%E5%93%81%E5%93%81%2C%E7%8E%B0%E4%BB%8E%E4%B8%AD%E4%BB%BB%E5%8F%962%E4%B8%AA%2C%E6%B1%82%E5%85%A8%E6%98%AF%E5%90%88%E6%A0%BC%E5%93%81%E7%9A%84%E6%A6%82%E7%8E%872.%E6%9F%90%E5%B0%84%E6%89%8B%E5%B0%84%E4%B8%AD10%E7%8E%AF%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA0.28%2C%E5%B0%84%E4%B8%AD9%E7%8E%AF%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA0.24%2C%E5%B0%84%E4%B8%AD8%E7%8E%AF%E7%9A%84%E6%A6%82%E7%8E%87%E4%B8%BA0.19%2C%E6%B1%82%E8%BF%99%E4%B8%AA%E5%B0%84%E6%89%8B%EF%BC%9A%EF%BC%881%EF%BC%89%E4%B8%80%E6%AC%A1%E5%B0%84%E4%B8%AD10%E7%8E%AF%E6%88%969%E7%8E%AF)
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