At a certain picnic, each of the guests was served either

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At a certain picnic, each of the guests was served either a single scoop or a double scoop 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 a double scoop of ice-cream.
(2) A total of 120 scoops of ice cream were served to all the guests at the picnic.

[spoiler]OA=C[/spoiler]

Source: Official Guide
Source: — Data Sufficiency |