How many ways can 5 identical red balls and 4 identical blue balls be arranged in a row such that no two blue balls are adjacent?
Question
Solution 1
The problem can be solved using the concept of permutations and combinations.
Step 1: Arrange the red balls
First, arrange the 5 identical red balls in a row. Since they are identical, there is only 1 way to do this.
R R R R R
Step 2: Identify the spaces between and at the ends of the red balls
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