Question 1
In how many ways can cars park in a row?
Step-by-Step Solution:
Concept: Linear permutation of n distinct objects = n! (n factorial)
Analysis:
- We need to arrange 6 distinct objects in a line
- For the first position: 6 choices
- For the second position: 5 choices (one already placed)
- For the third position: 4 choices
- And so on...
Formula Application:
Number of arrangements = 6! = 6 × 5 × 4 × ... × 2 × 1
Calculation:
6! = 720
Key Concept: The factorial function represents the number of ways to arrange n distinct objects in a sequence.
Common Mistake: Don't confuse permutation (arrangement matters) with combination (arrangement doesn't matter).
Concept: Linear permutation of n distinct objects = n! (n factorial)
Analysis:
- We need to arrange 6 distinct objects in a line
- For the first position: 6 choices
- For the second position: 5 choices (one already placed)
- For the third position: 4 choices
- And so on...
Formula Application:
Number of arrangements = 6! = 6 × 5 × 4 × ... × 2 × 1
Calculation:
6! = 720
Key Concept: The factorial function represents the number of ways to arrange n distinct objects in a sequence.
Common Mistake: Don't confuse permutation (arrangement matters) with combination (arrangement doesn't matter).