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[Problem Solving]
试题详情
题目：
If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?
选项:
A、5 to 4
B、3 to 2
C、2 to 1
D、5 to 1
E、6 to 1
答案:
E
提问：
具体的解题步骤
解答：
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提问：
具体的解题步骤
解答：
点赞1
阅读2143
提问：
If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?
5 to 4
3 to 2
2 to 1
5 to 1
6 to 1
解答：
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阅读2184
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