Permutation and Combination

Good afternoon, students, today we will start with next topic, Permutations and

Combinations. In permutations and combinations we will talk about counting. We will know

how to count fast. In this we will study how to count quickly.

For example, in this row 8 students are sitting. One way of counting is 1, 2, 3, 4, 5, 6, […]