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picnic

by GmatKiss » Sat Aug 13, 2011 1:33 pm
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 a double scoop of ice cream.
(2) A total of 120 scoops of ice cream were served
to all the guests at the picnic.
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Source: — Data Sufficiency |
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by gmatboost » Mon Aug 15, 2011 10:05 am
S = single
D = double
total = S + D

Question: D = ?
Statement 1: 0.6(S+D) = D
Statement 2: S + 2D = 120

Answer C
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