How many ways to arrange 5 people in a row?
How many ways to arrange 5 people in a row?
Approach: Calculate 5 factorial.
120. 5 * 4 * 3 * 2 * 1 = 120.
Follow-up: How many ways to arrange them in a circle?
Key concepts: factorials, permutations.
How many ways to arrange 5 people in a row?
Approach: Calculate 5 factorial.
120. 5 * 4 * 3 * 2 * 1 = 120.
Follow-up: How many ways to arrange them in a circle?
Key concepts: factorials, permutations.