Variations with repetition
The calculator calculates the number of variations with repetition. A variation of the k-th class with repetition of n elements is any ordered k-element group composed of only these n elements such that each element can be repeated any number of times.Calculation:
Vk′(n)=nk n=10 k=4 V4′(10)=104=10000
The number of variations with repetition: 10000
A bit of theory - the foundation of combinatorics
Variations with repetition
A variation of the k-th class of n elements is an ordered k-element group formed of a set of n elements, wherein the elements can be repeated and depends on their order. A typical example is the formation of numbers from the numbers 2,3,4,5, and finding their number. We calculate their number according to the combinatorial rule of the product:Vk′(n)=n⋅n⋅n⋅n...n=nk
Foundation of combinatorics in word problems
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- Seating
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Calculate how many different numbers can be encoded in a 16-bit binary word.
- Flags
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- Seating rules
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- Toys
3 children pulled 12 different toys from a box. How many ways can toys be divided so each child has at least one toy?
- No. of divisors
How many different divisors have number 13 4 * 2 4?
- Vans
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- Peak
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- Variations
Find the number of items when the count of variations of the fourth class without repeating is 42 times larger than the count of variations of the third class without repetition.
- Hockey players
After we cycle, five hockey players sit down. What is the probability that the two best scorers of this crew will sit next to each other?
- Seven-segmet
Lenka is amused that he punched a calculator (seven-segment display) number and used only digits 2 to 9. Some numbers have the property that She again gave their image in the axial or central symmetry some number. Determine the maximum number of three-dig
- A three-digit numbers
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