Fun Video: Introduction to Permutations

# Fun Video: Introduction to Permutations Video Lecture | Mathematics (Maths) for JEE Main & Advanced

## Mathematics (Maths) for JEE Main & Advanced

209 videos|443 docs|143 tests

## FAQs on Fun Video: Introduction to Permutations Video Lecture - Mathematics (Maths) for JEE Main & Advanced

 1. What are permutations and how are they used in mathematics?
Ans. Permutations refer to the arrangement of objects in a specific order. In mathematics, permutations are used to calculate the number of different ways objects can be arranged. They are commonly used in combinatorics, probability, and algebra.
 2. Are permutations and combinations the same thing?
Ans. No, permutations and combinations are not the same thing. While permutations consider the order of objects, combinations do not. Permutations focus on the arrangement of objects, whereas combinations only consider the selection of objects without regard to their order.
 3. How can I calculate the number of permutations?
Ans. The number of permutations can be calculated using the formula nPr = n! / (n-r)!, where n represents the total number of objects and r represents the number of objects being arranged. The exclamation mark denotes the factorial operation, which means multiplying the number by all positive integers less than it.
 4. Can you provide an example of using permutations in real-life scenarios?
Ans. One example of using permutations in real life is when determining the number of possible outcomes in a lottery draw. Let's say there are 50 numbers and you need to select 6. The number of permutations would be calculated as 50P6, giving you the total number of different combinations of numbers you can choose.
 5. What is the difference between a permutation and a permutation with repetition?
Ans. In a standard permutation, each object is used only once in the arrangement. However, in a permutation with repetition, objects can be repeated in the arrangement. For example, when arranging the letters of the word "MISSISSIPPI," a permutation with repetition is used since there are repeated letters.

## Mathematics (Maths) for JEE Main & Advanced

209 videos|443 docs|143 tests

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