Permutations and combinations: Updated for new NCERT - 2026

Updated for new NCERT - 2026 Exams Edition. Answers of Chapter 6 Class 11 NCERT Book are provided with detailed step-by-step explanation of each question. Solutions of all questions, examples, miscellaneous of Chapter 6 Class 11 Permuations & Combinations are given for your reference. Check the questions from the Exercises given below, or study the chapter concept wise way. The topics in the chapter include What is a factorial notation? Fundamental Principle of Counting (or the ... Permutation is the arrangement of items in which the order of selection matters. Combination is selecting items without considering order. For example, in the below diagram, PQ and QP are different in permutation but same in combination. Therefore we have more permutations than combinations. Learn the basics of Permutation and Combination, important formulas, and solved examples to easily understand how to arrange and select objects in different ways. Permutations and combinations, the various ways in which objects from a set may be selected, generally without replacement, to form subsets. This selection of subsets is called a permutation when the order of selection is a factor, a combination when order is not a factor.