At a certain picnic, each of the guests was served either a single scoop or a double scoop of ice cream. How many of the guests were served a double scoop of ice cream?
1. At the picnic, 60 percent of the guests were served double scoop
2. A total of 120 scoops of ice cream were served to all guests at the picnic.

My questions is: Is double scoop = 2 single scoops? or a double scoop is a scoop of its kind and a single scoop is second kind?

Let x= served single scoop, y=served double scoop

If we consider double scoop = 2 single scoops
from 1: 2y=3x
from 2: x+2y=120
therefore C

If we consider double scoop(d) as one kind and single scoop(s) as another kind
from 1: 2y=3x
from 2: s+d=120
therefore E