Permutations and Combinations

Permutations and Combinations is a method in which elements from a set can be picked to form subsets. A permutation is used for a list of data where the order of the data is important, but a combination is used for a group of data where the order of the data is irrelevant.

Concepts

Formulas

Practice Questions

Real-Life Applications of Permutations and Combinations

Real-life examples where the concepts of Permutations and Combinations is involved are:

Application 1:

Imagine you're cooking a sandwich and require two slices of bread. There are just 10 remaining. You could have combined those slices of bread in 10C2 (45) different ways. Furthermore, each slice can be placed on top or bottom of the sandwich, allowing it to be prepared in 10P2 (90) different ways.

Application 2:

It is employed in security applications and cryptography, for example, in number locks, pattern locks in mobile phones, and so on.

Application 3:

There are a total of 12 novels. How many different ways can you place them on the shelf in the traditional upright orientation of a library?

Permutations and Combinations Aptitude Resources

The resources mentioned below can help you with your Permutations and Combinations aptitude preparation

1. Concepts

Learn important concepts related to Permutations and Combinations. Once you begin comprehending what has to be assessed, you develop a better understanding of the nature of the questions.

2. Formulas

Learn important formulas linked to the Permutations and Combinations problems that can help you answer the questions quickly and develop a greater understanding of the concepts.

3. Practice Problems

Practice sample problems related to the Permutations and Combinations topic. A candidate is more likely to comprehend the concept and improve their speed and precision the more questions they practice.

FAQsFAQs

How important is the Permutations and Combinations topic in placement examinations?

Permutations and Combinations topic carry high weightage in the Quantitative Aptitude examinations.

Is Permutations and Combinations difficult to learn?

No, Permutations and Combinations topic is not difficult to understand. Students must practice Permutations and Combinations on a daily basis and memorise formulas to address the problems accurately. Students must also learn different shortcuts & tricks to improve their solving speed.

What is the fastest and most effective way to learn the Permutations and Combinations topic?

Students must understand the foundations and formulas of Permutations and Combinations. They should be informed of the shortcuts and tricks for various types of questions on the topic. They must practice on a daily basis before taking a weekly mock exam.