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Gaokao Math Practice Question

12. (5 分) 定义“规范 01 数列” $\left\{a_{n}\right\}$ 如下: $\left\{a_{n}\right\}$ 共有 $2 m$ 项, 其中 $m$ 项为 $0, m$ 项 为 1 , 且对任意 $k \leqslant 2 m, a_{1}, a_{2}, \ldots, a_{k}$ 中 0 的个数不少于 1 的个数, 若 $m=4$, 则不同的“规范 01 数列”共有()

  1. A.18 个
  2. B.16 个
  3. C.14 个
  4. D.12 个 \section{

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