Question

In a train 5 seats are vacant then how many ways can three passengers sit

• A. 20
• B. 30
• C. 60
• D. 10

Answer 1

Answer: (C)

60

Answer 2

Number of ways are = $5P_{3} = \frac{5!}{(5 - 3)!} = \frac{5!}{2!} = \frac{120}{2} = 60$.