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On other days, I often see two colours before my eyes — blue and yellow. I feel sad about what is happening. That is why I have a task for you today about colours. I have 5 markers in my pencil case: blue, yellow, green, red, and purple. In how many ways can I arrange them in my pencil case if blue and yellow must always be together (in that order)?
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You need to know the following knowledge to solve this word math problem:
combinatoricsbasic operations and conceptsGrade of the word problem
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