Mathematics
Senior High
Resolved
この答えが12なのですが、途中式が分からないので教えて頂きたいです🙇🏻♀️
You need to put your reindeer, Quentin, Jebediah, Lancer, and Gloopin, in a single-file line to pull your sleigh.
However, Gloopin and Lancer are fighting, so you have to keep them apart, or they won't fly.
How many ways can you arrange your reindeer?
12
Answers
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なるほどです。
4!-3!×2!であっていますか?