An elevator starts with 5 pasengers and stops at 8 different floors of the house. Find out the probability of all the 5 passengers alighting at different floors.	Choose the most appropriate option.
A) 90 / 512 B) 105 / 512 C) 15/512 D) 30/512 E) 48/512
Explanation :   Probability   =&gt; No. of arrangements with restriction / No. of arrangements without restriction .   =&gt; nPr / nr.   =&gt; 8P5 / 85 .   =&gt; 105 / 512.   Required probability is 105 / 512.   Answer : 105 / 512
<result>B</result>
An elevator starts with 5 pasengers and stops at 8 different floors of the house. Find out the probability of all the 5 passengers alighting at different floors.