Young Master's Reading, Young Master's Daily, Happy Reading, and Chinese Young Master's Digest. Xiao Ming took out two books from them. How many different ways to take them?
2024-09-11 23:17
2024-09-12 02:45
Shōnen Bo, Little Master's Daily, Happy Reading, and China Shōnen Digest were all different types of novels. Their names already explained their content. Xiao Ming took out two books from the book, which could be divided into two categories according to the specific situation. For example, Xiao Ming could take out a book from the Youth's Books and Happy Reading. That way, he would have two kinds of books. Xiao Ming could also take out a book from the Book of Youth and another book from the Happy Reading. That way, he would only have two kinds of books left. These two methods had two different methods.
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