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a, b, c, d, e, f, g, h, i, j
Let S be the set of all 10-letter sequences consisting of the 10 letters above.
Let T be the set of all 8-letter sequences consisting of the first 8 letters above.
Let S be the set of all 10-letter sequences consisting of the 10 letters above.
Let T be the set of all 8-letter sequences consisting of the first 8 letters above.
Quantity A
The number of sequences in S in which f, b, h, and g appear consecutively in that order
Quantity B
The number of sequences in T in which f and b appear consecutively in that order
C显示答案
· 相关考点
6.3.8 其他特殊排列组合技巧
6.3.8 其他特殊排列组合技巧
以上解析由 考满分老师提供。
