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Results tagged with combinatorics
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user 1112813
For questions about the study of finite or countable discrete structures, especially how to count or enumerate elements in a set (perhaps of all possibilities) or any subset. It includes questions on permutations, combinations, bijective proofs, and generating functions.
2
votes
0
answers
28
views
How many vectors of $(x_1,.....,x_n)$ are there, such that each $x_i$ is a nonnegative integ... [duplicate]
Note: I know there's a very similar question to this one, where only positive integers are counted, but it's not helpful enough for me to answer my question at the bottom.
My approach:
1. Stars and Ba …
- 373
10
votes
What's Wrong With My Math - Odds of 3 Cards of the Same Suit When Drawing 10 Cards
So the problem lies in the fact that you're overcounting, Why?
You're clearly calculating ${5 \choose 1}$ combinations of suits and ${5 \choose 3}$ combinations of ranks. Where it goes wrong is when y …
- 373