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题目内容
In a bowl that contains 20 marbles,7 are green,6 are red,and the remainder are blue.Two marbles are to be drawn at random from the bowl without replacement.
Quantity A
The probability that one marble is green and the other marble is red
Quantity B
The probability that one marble is green and the other marble is blue
B显示答案
以上解析由 考满分老师提供。