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The graph above shows how long departures from a certain airport were

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Math Expert
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Joined: 02 Sep 2009
Posts: 60460
The graph above shows how long departures from a certain airport were  [#permalink]

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New post 18 Nov 2015, 23:33
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A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

69% (01:36) correct 31% (01:37) wrong based on 114 sessions

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Math Expert
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V
Joined: 02 Aug 2009
Posts: 8341
Re: The graph above shows how long departures from a certain airport were  [#permalink]

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New post 19 Nov 2015, 03:46
Bunuel wrote:
Image
The graph above shows how long departures from a certain airport were delayed on a certain day. If 1,200 flights were delayed, how many flights departed on time?

A. 250
B. 300
C. 350
D. 400
E. 900

Attachment:
2015-11-19_1032.png


Hi,
as per graph 75% delayed so 25 % were on time..
given that 75%=1200 ..
so 25% =400..
ans D
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Re: The graph above shows how long departures from a certain airport were  [#permalink]

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New post 19 Nov 2015, 19:01
Flights delayed = 75%
Flights on Time = 25%

Total Number f flights = 75% of Total = 1200 => 1600
Flights on time = 25% of 1600 => 400

Ans: D
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Re: The graph above shows how long departures from a certain airport were  [#permalink]

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New post 21 Jun 2017, 05:52
Bunuel wrote:
Image
The graph above shows how long departures from a certain airport were delayed on a certain day. If 1,200 flights were delayed, how many flights departed on time?

A. 250
B. 300
C. 350
D. 400
E. 900

Attachment:
2015-11-19_1032.png


To solve this question just read the graph carefully- the sum of the following values, 75 percent, is represented by 1200 flights so

x(3/4) =12000
3x= 48000
x= 16000

16000-12000= 400

Thus
"D"
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Re: The graph above shows how long departures from a certain airport were  [#permalink]

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New post 24 Jun 2017, 08:19
Bunuel wrote:
Image
The graph above shows how long departures from a certain airport were delayed on a certain day. If 1,200 flights were delayed, how many flights departed on time?

A. 250
B. 300
C. 350
D. 400
E. 900


According to the chart, we see that 43 + 17 + 12 + 3 = 75%, or ¾, of the total flights were delayed. If we let T = the total number of flights, we have:

(3/4)(T) = 1200

3T = 1200 x 4

T = 400 x 4 = 1600.

Since 100 - 75 = 25%, or ¼, of the flights were on time, 1/4 x 1600 = 400 flights were on time.

Answer: D
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Re: The graph above shows how long departures from a certain airport were   [#permalink] 24 Jun 2017, 08:19
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