Shortcuts for Permutation & Combinations to Solve Complex Problems

# Shortcuts for Permutation & Combinations to Solve Complex Problems Video Lecture | CSAT Preparation - UPSC

## CSAT Preparation

207 videos|156 docs|192 tests

## FAQs on Shortcuts for Permutation & Combinations to Solve Complex Problems Video Lecture - CSAT Preparation - UPSC

 1. What are the basic formulas for permutation and combination?
Ans. The basic formulas for permutation and combination are as follows: - Permutation formula: P(n, r) = n! / (n-r)! - Combination formula: C(n, r) = n! / (r!(n-r)!)
 2. How do I determine whether to use permutation or combination in a problem?
Ans. To determine whether to use permutation or combination, you need to consider whether the order of the elements matters or not. If the order matters, use permutation. If the order doesn't matter, use combination.
 3. Can you give an example of a permutation problem?
Ans. Sure! Let's say you have 5 different books and you want to arrange them on a shelf. The number of ways you can arrange the books is an example of a permutation problem.
 4. Can you give an example of a combination problem?
Ans. Of course! Let's say you have 10 people and you want to form a committee of 3 people. The number of ways you can choose the committee members is an example of a combination problem.
 5. How can I apply permutation and combination in real-life situations?
Ans. Permutation and combination concepts can be applied in various real-life situations. For example, you can use permutation to determine the number of possible passwords that can be created using a set of characters. You can use combination to determine the number of possible combinations of ingredients in a recipe.

## CSAT Preparation

207 videos|156 docs|192 tests

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