AMC 8 2022 Problem 23
AMC8 2022 年第 23 题
概率★★★★☆
A \triangle or \bigcirc is placed in each of the nine squares in a 3 -by- 3 grid. Shown below is a sample configuration with three \triangle s in a line. How many configurations will have three \triangle s in a line and three \bigcirc s in a line?
在 3×3 方格表的九个单元格的每个中放置△或○。下图是一种有三个△在一条线上的放置方法。问在有三个△在一条线上，并且有三个○在一条线上的放置方法有多少种？
- A.39
- B.42
- C.78
- D.84
- E.96
正确答案 · Correct Answer
D
解析 · Solution
解析整理中
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