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OS: Flights are late

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OS: Flights are late [#permalink] New post 29 Sep 2004, 22:25
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 [#permalink] New post 29 Sep 2004, 22:38
D is the answer

%ge of Flights delayed: 43+17+12+3=75
Therefore,75% were delayed.

From the question,
.75(Total Number of flights)=1200
Total Number of flights=1600

Flights on time(X)
= 100-(%Delayed flights)
=100-75=25%

Therefore, flights that departed on time are
.25*1600=400
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 [#permalink] New post 29 Sep 2004, 23:33
75% of the flights were late --> 1200 flights
x = 25% and so number of flights on schedule is (25/75)*1200 = 400
  [#permalink] 29 Sep 2004, 23:33
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