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# OS: Flights are late

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Director
Joined: 20 Jul 2004
Posts: 592
OS: Flights are late [#permalink]

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29 Sep 2004, 22:25
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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Senior Manager
Joined: 21 Jun 2004
Posts: 336

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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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GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

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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
29 Sep 2004, 23:33
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# OS: Flights are late

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