If I have kept six different books on a shell, in how many different ways can…
2025
If I have kept six different books on a shell, in how many different ways can I arrange them.
- A.
600
- B.
200
- C.
210
- D.
720
Attempted by 81 students.
Show answer & explanation
Correct answer: D
Answer: 720
Explanation:
The number of ways to arrange n distinct items is n! (n factorial).
For 6 different books, compute 6! = 6 × 5 × 4 × 3 × 2 × 1.
Compute stepwise: 6 × 5 = 30; 30 × 4 = 120; 120 × 3 = 360; 360 × 2 = 720; 720 × 1 = 720.
Therefore, the total number of arrangements is 720.