11th mathematics exercise questions with answers, Mathematics

Permutation and Combination – Class XI – Exercise 7.1

1: 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? Solution: (i) There will be number of ways of filling 3 vacant places in succession by the given five digits. Here,… Continue reading Permutation and Combination – Class XI – Exercise 7.1