Final answer:
The probability that Emily will be seated closest to the ride's exit is 1/12.
Step-by-step explanation:
To find the probability that Emily will be seated closest to the ride's exit, we need to find the total number of possible seating arrangements and the number of arrangements where Emily is closest to the exit.
There are 24 total seats on the merry-go-round (16 horses + 8 unicorns). Out of these, only two seats are closest to the exit. Therefore, the probability that Emily will be seated closest to the ride's exit is:
P(E)= 2/24 = 1/12