Last updated at Jan. 30, 2020 by Teachoo

Transcript

Misc 11 In how many ways can the letters of the word ASSASSINATION be arranged so that all the Sโs are together? Since we need to assigned 4S together, We consider 4S as one block So, our letters become We arrange them now Since letters are repeating Hence we use this formula = ๐!/(๐1!๐2!๐3! ) Here, n = Letters to be arranged = 9 + 1 = 10 Since 3A, 2I, 2N p1 = 3, p2 = 2, p3 = 2, Number of arrangements where the Sโs are together = 10!/3!2!2! = (10 ร 9 ร 8 ร 7 ร 6 ร 5 ร 4 ร 3!)/(3! 2! 2!) = 151200

Chapter 7 Class 11 Permutations and Combinations

Class 11

Important Questions for exams Class 11

- Chapter 1 Class 11 Sets
- Chapter 2 Class 11 Relations and Functions
- Chapter 3 Class 11 Trigonometric Functions
- Chapter 4 Class 11 Mathematical Induction
- Chapter 5 Class 11 Complex Numbers
- Chapter 6 Class 11 Linear Inequalities
- Chapter 7 Class 11 Permutations and Combinations
- Chapter 8 Class 11 Binomial Theorem
- Chapter 9 Class 11 Sequences and Series
- Chapter 10 Class 11 Straight Lines
- Chapter 11 Class 11 Conic Sections
- Chapter 12 Class 11 Introduction to Three Dimensional Geometry
- Chapter 13 Class 11 Limits and Derivatives
- Chapter 14 Class 11 Mathematical Reasoning
- Chapter 15 Class 11 Statistics
- Chapter 16 Class 11 Probability

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.