According to the conditions, 12x = 0. 12,
The solution is x = 100.
That is, 100 people are selected from the liberal arts candidates in our school.
(ii) observing the frequency distribution histogram,
It is known that the number of students from 59.5 to 64.5 and from 99.5 to 104.5 is the same;
There are as many students from 64.5 to 69.5 as from 69.5 to 74.5.
84.5 to 89.5 have the largest number of students.
Reach 0.27× 100=27 people.
(Ⅲ) 1-0.27-0. 1-0. 12-0.06-0.06-0.03=0.36.
In other words, the passing rate of students in this school is 36%.