25. 100 individuals get on at the ground level in a very large elevator. Assume that each individual's destination is independent of all the other individuals' destinations and that there is an equal probability that each
individual gets off at any floor. There are 2018 floors above the ground floor that the elevator can stop at.
1
Thus, the probability that a person gets off at any particular floor is Compute the expected number
2018
of floors above the ground floor at which the elevator will stop.
2018
2017100
2018
2017
A)
B)
C) 20181-
201899
2017
2018
100
2018
D) 100
2017
2018
E) NONE OF THESE