The five rings on the flag are Blue, Black, Red, Yellow and Green. [img]2011q4/

游客2023-10-15 49

问题 The five rings on the flag are Blue, Black, Red, Yellow and Green.

In how many different ways could the rings have been arranged in colour order?

选项 A、120
B、100
C、80
D、60

答案 A

解析有五种颜色，依据排列组合可以得出数学算式：5×4×3×2×1=120。

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