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Blues must be separated!

Discrete Mathematics Level 4

How many ways are there to arrange 5 red, 5 blue, and 5 green balls in a row such that no two blue balls lie next to each other?

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

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Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

Used and loved by 4 million people

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including olympiad champions, researchers, and professionals.

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by Ravi Dwivedi

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