Answer:
30 people ordered the apply pie
Explanation:
Given
Total number of people = 180
It is given that one -third of the people order the ice cream
So the people who order ice cream are:

60 people order ice cream and rest who ordered pie are:
= 180-60 = 120
Now it is given that one-fourth of the people who ordered pie ordered apple pie
So,

Hence,
30 people ordered the apply pie