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Combinatorics

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There are total 21 identical balls in a shop and 7 children. In how many ways can 7 children claim the balls? (it is not necessary to claim all the balls)
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Deepak Poonia asked Jul 1, 2023
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Combinatorics Question uOttawa (University of Ottawa)
Consider the fourteen letters: $\text{A A A B B C C C C C D E E E}$ . An ARRANGEMENT is a sequence using $\text{all}$ ... order, somewhere in the arrangement). c) How many words have all letters distinct? d) How many arrangements have no two vowels consecutive?
Consider the fourteen letters: $\text{A A A B B C C C C C D E E E}$ .An ARRANGEMENT is a sequence using $\text{all}$ of these letters.For the purposes of this question, a...
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