2. 外语
  3. Set A = {2, 4, 6}, Set B = {2, 4, 6, 8, 10, 12}. Now what is the possible number of Set C, such that A is a subset of C and C is

Set A = {2, 4, 6}, Set B = {2, 4, 6, 8, 10, 12}. Now what is the possible number of Set C, such that A is a subset of C and C is

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问题 Set A = {2, 4, 6}, Set B = {2, 4, 6, 8, 10, 12}. Now what is the possible number of Set C, such that A is a subset of C and C is a subset of B? ________.
选项
答案8
解析 A是C的子集，说明C一定包含2，4，6；C是B的子集，所以C有可能(有或无)包括8，10，120这三个数字每个都有“选择”和“不选”两种方案，因此答案是2×2×2=8。
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