Ex 7.1,3 - Chapter 7 Class 11 Permutations and Combinations
Last updated at May 29, 2018 by Teachoo
Transcript
Ex 7.1, 3 How many 4-letter code can be formed using the first 10 letters of the English alphabet, if no letter can be repeated? No. of letters = 10 Code is of the form Total number of possible 4-letter code = 10 × 9 × 8 × 7 = 5040 Hence 5040 ways 4 letter code can be formed
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.