NCERT Solutions Class 11 Mathematics Chapter 7 Permutations and Combinations

Exercise 7.1 Question. How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that  (i) repetition of the digits is allowed? (ii) repetition of the digits is not allowed ? Answer : (i) There will be as many ways as there are ways of filling 3…