Last updated at May 29, 2018 by Teachoo

Transcript

Example 1 Find the number of 4 letter words, with or without meaning, which can be formed out of the letters of the word ROSE, where the repetition of the letters is not allowed . Number of letters which can be filled in different places are Number of ways in which 4 places can be filled = 4 × 3 × 2 × 1 = 24 Hence, number of 4 letter words is 24

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Chapter 7 Class 11 Permutations and Combinations

Serial order wise

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.