Answer:
1/8 is the probability of any student who is surveyed randomly ,likes chicken.
Step-by-step explanation:
Total students surveyed = 240
Number of Students who like chicken = 30
Number of students who like pasta = 18
Now, Let E: Event of children preferring chicken
Then , 
⇒ P(E) = 30/ 240
P(Students who like chicken) = 1/8
So, the 1/8 is the probability of any student who is surveyed randomly ,likes chicken.