How many different ways can 3 boys and 2 girls be seated in a row?
Practice Questions
Q1
How many different ways can 3 boys and 2 girls be seated in a row?
30
60
120
180
Questions & Step-by-Step Solutions
How many different ways can 3 boys and 2 girls be seated in a row?
Step 1: Identify the total number of people to arrange. In this case, there are 3 boys and 2 girls, which makes a total of 5 people.
Step 2: Understand that arranging 5 people in a row can be calculated using the factorial of the number of people. The factorial of a number (n!) is the product of all positive integers up to that number.
Step 3: Calculate the factorial of 5. This means you multiply 5 × 4 × 3 × 2 × 1.
Step 4: Perform the multiplication: 5 × 4 = 20, then 20 × 3 = 60, then 60 × 2 = 120, and finally 120 × 1 = 120.
Step 5: Conclude that there are 120 different ways to arrange 3 boys and 2 girls in a row.
Permutations – The question tests the understanding of permutations, specifically how to arrange a set number of distinct objects (in this case, 5 individuals) in a specific order.