How Do You Calculate 'n' in This Permutation Problem?

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In summary, a permutation is an arrangement of objects in a specific order. The number of permutations can be found using the formula n! / (n-r)!, and it differs from combination in that it involves ordering the selected objects. Permutations can be used in real life situations such as determining the order in which people play a game. In mathematics and science, permutations are used in various fields to solve problems related to arrangements, combinations, and probability.
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Arunachaleshwar
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Find 'n' using permutations:

1/4! + 1/5! + 1/6! = n/7!
 
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Arunachaleshwar said:
1/4! + 1/5! + 1/6! = n/7!

Welcome on MHB Arunachaleshwar!...

... the problem You propose is not 'impossible'... multiplying the two sides for 7! You have...

$\displaystyle n= 7 \cdot 6 \cdot 5 + 7 \cdot 6 + 7 = 259$

... can it be that You are sending an encrypted message in which the number 259 has a special meaning? ...

Kind regards

$\chi$ $\sigma$
 

FAQ: How Do You Calculate 'n' in This Permutation Problem?

What is a permutation?

A permutation is an arrangement of objects or elements in a specific order. In other words, it is a way of selecting and ordering a set of objects.

How do you find the number of permutations?

The number of permutations can be found by using the formula n! / (n-r)!, where n is the total number of objects and r is the number of objects being selected and ordered. This formula is also known as the permutation formula.

What is the difference between permutation and combination?

Permutation involves selecting and ordering a set of objects, while combination only involves selecting a set of objects without considering the order in which they are selected.

Can you give an example of using permutations in real life?

One example is when a group of people take turns playing a game. The order in which they play can be determined by using permutations.

How is permutation used in mathematics and science?

Permutation is used in a variety of mathematical and scientific fields, such as statistics, computer science, and genetics. It is used to solve problems involving arrangements, combinations, and probability.

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