2018 AMC 8 Problems/Problem 16
Problem 16
Professor Chang has nine different language books lined up on a bookshelf: two Arabic, three German, and four Spanish. How many ways are there to arrange the nine books on the shelf keeping the Arabic books together and keeping the Spanish books together?
Solution
There are 
ways to arrange the Arabic books within their block, 
for Spanish, and 
for the two blocks and three books, for a product of 
.
| 2018 AMC 8 (Problems • Answer Key • Resources) | ||
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Followed by Problem 17 | |
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