11th mathematics exercise questions with answers, Mathematics

Permutation and Combination – Class XI – Exercise 7.3

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated? Solution: 3-digit numbers have to be formed using the digits 1 to 9. Here, the order of the digits matters. Therefore, there will be as many 3-digit numbers as there are permutations of 9 different digits… Continue reading Permutation and Combination – Class XI – Exercise 7.3