Question

In a $12$ storied building , $3$ person enter a lift cabin. It is known that they will leave the lift at different floors. In how many ways can they do so if the lift does not stop at the second floor?

• A. $36$
• B. $120$
• C. $240$
• D. $720$

Answer 1

The correct option is D $720$

The lift can stop at $12-1-1=10$ floors
So total required ways is $=10\times 9\times 8=720$