Yes. All of those. Also a real number.
Answer: 1/14
Solution:
1/2 + x = 4/7
4/7 - 1/2 = x
8/14 - 7/14 = 1/14
Check:
1/2 + 1/14 = 7/14 + 1/14 = 8/14 = 4/7
Add all of the students who like the ice creams and subtract from 147 :)
167 i believe according to my calculations