Konijntje's blog

Looking for Number of cases & Probability Problems & Materials.
By Konijntje, history, 5 years ago, In English

Recently, I felt lack of knowledge and techniques for solving various number of cases, probability and expected number problems.

I did not managed to solve a lot of problems including

(For the first three problems, I did not managed to solve problem in contest. And, I think it led to unsatisfying results.)

I really want to be good at this kind of problems, so could anyone give sufficient number of problems, or materials (including book) to improve my skill?

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5 years ago, # |
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Read a book on combinatorics/probability. You can also check out my two blogs: one, two.

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    5 years ago, # ^ |
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    I skimmed through your blogs, and I think I know basic concepts of expected value.

    Can you recommend a book on combinatorics?

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      5 years ago, # ^ |
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      Contribution technique and "ordered pairs" are more than basic concepts for sure. (but ofc. maybe you already know them)

      Idk about a particular book. I learned combinatorics and pbility in school&uni.

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