Mathematics Exam > Mathematics Videos > Mathematics for IIT JAM, GATE, CSIR NET, UGC NET > Explanation: Permutation
Explanation: Permutation Video Lecture | Mathematics for IIT JAM, GATE, CSIR NET, UGC NET
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FAQs on Explanation: Permutation Video Lecture - Mathematics for IIT JAM, GATE, CSIR NET, UGC NET
| 1. What is a permutation? |  |
Ans. A permutation is an arrangement of objects in a specific order. In mathematics, it refers to the different ways in which a set of objects can be arranged or ordered.
| 2. How can permutations be calculated? | |
Ans. Permutations can be calculated using the formula P(n, r) = n! / (n-r)!, where n represents the total number of objects and r represents the number of objects to be selected and arranged.
| 3. What is the difference between permutation and combination? | |
Ans. The main difference between permutation and combination is that permutation involves arranging objects in a specific order, while combination does not consider the order of arrangement.
| 4. Can repetition occur in permutations? | |
Ans. It depends on the context. In some cases, repetitions are allowed in permutations, while in others, they are not. For example, when arranging letters of a word, repetitions are not allowed, but when selecting objects from a set, repetitions may be allowed.
| 5. How are permutations used in real-life situations? | |
Ans. Permutations have various applications in real-life situations. They are used in probability calculations, cryptography, computer algorithms, scheduling, and arranging objects or people in a specific order, such as seating arrangements or organizing events.
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Jan 04, 2025
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