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Selection: Permutations & Combinations Video Lecture | General Aptitude for GATE - Mechanical Engineering

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FAQs on Selection: Permutations & Combinations Video Lecture - General Aptitude for GATE - Mechanical Engineering

1. What is the difference between permutations and combinations?

Ans. Permutations refer to the arrangement of objects in a particular order, while combinations focus on the selection of objects without considering the order.

2. How do you calculate the number of permutations?

Ans. The number of permutations can be calculated using the formula: n! / (n - r)!, where n represents the total number of objects and r represents the number of objects being arranged.

3. What is the formula for calculating combinations?

Ans. The formula for combinations is nCr = n! / (r! * (n - r)!), where n represents the total number of objects and r represents the number of objects being selected.

4. In how many ways can you arrange a set of 5 objects?

Ans. If you have a set of 5 objects, the number of permutations can be calculated as 5! = 5 x 4 x 3 x 2 x 1 = 120 ways.

5. How many different combinations can be formed from a set of 6 objects choosing 3 at a time?

Ans. Using the combination formula, the number of combinations from 6 objects choosing 3 at a time can be calculated as 6C3 = 6! / (3! * (6 - 3)!) = 20 ways.

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Apr 11, 2025 Last updated

Video Description: Selection: Permutations & Combinations for Mechanical Engineering 2025 is part of General Aptitude for GATE preparation. The notes and questions for Selection: Permutations & Combinations have been prepared according to the Mechanical Engineering exam syllabus. Information about Selection: Permutations & Combinations covers all important topics for Mechanical Engineering 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Selection: Permutations & Combinations.

Introduction of Selection: Permutations & Combinations in English is available as part of our General Aptitude for GATE for Mechanical Engineering & Selection: Permutations & Combinations in Hindi for General Aptitude for GATE course. Download more important topics related with notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.

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