Four persons enter the lift of a nine storey building at the ground floor. In how many ways can they get out of lift on any floor other than ground floor
Choose the most appropriate option:
A) 720	B) 1296	C) 1540	D) 4096	E) 5125
Each person out of 4 has 8 floors (options) to get out of (since no one gets out on the ground floor), hence total ways is 8*8*8*8=8^4=4096.   Answer: 4096.
<result>D</result>
Four persons enter the lift of a nine storey building at the ground floor. In how many ways can they get out of lift on any floor other than ground floor