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投骰子游戏中，先后投掷两次，两次出现的点数相加的点数之和为7的概率是（）。

A

1/6

B

1/12

C

1/2

D

1/3

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古典概型

多做几道

A

-10

B

C

D

10

A

0

B

0.25

C

0.5

D

1

A

B

C

D

A

B

C

D

A

B

C

D

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