In order to better control traffic at a certain busy intersection, a s

Question

https://gmatclub.com/forum/download/file.php?mode=view&id=73816 In order to better control traffic at a certain busy intersection, a study was conducted to determine how many vehicles passed through the intersection during various times of day and what trajectories they took. For each possible trajectory (combination of direction from which a vehicle entered the intersection and direction to which it exited the intersection), the graph shows the number of vehicles passing through the intersection during a certain hour. Select from the drop-down menus the options that create the statement that most accurately reflects the information provided. During the hour, the greatest number of vehicles entered the intersection from the GRAPH_1_PLACEHOLDER , and among those vehicles entering the intersection from that direction, the greatest number of vehicles exited the intersection to the GRAPH_2_PLACEHOLDER 13.jpg

GMATCoachBen · Accepted Answer

Short video solution here (1:04):

https://www.youtube.com/watch?v=7ytmdBCyPl0

GMATBusters · Answer

Hi You are looking at the bar " west to east", it is definitely longer than "south to north"

but to find "greatest number of vehicles entered the intersection"  we need to add all vehicles  entering   from south   and total number of vehicles  entering  from west .  This means we need to compare the sum of three bars for both west and south  which  makes  "south entrance "  right answer for first prompt.

er_suraj · Answer

Why not from West to East?

GMATCoachBen · Answer

er_suraj Good question, there is a reading trap here, we must be very careful! The stem says, "and among those vehicles entering the intersection from THAT direction...". So, the two answer choices are interconnected; "THAT direction" refers to the answer for the first blank, "south". Therefore, for the second blank, we are only looking at the three rows for "entered from SOUTH". Here's a video solution for blank 2, it's only 27 seconds long: https://www.youtube.com/watch?v=7ytmdBCyPl0&t=36s Does that help? Please let me know if you have any further questions, thanks!

Riya1475828 · Answer

GMATCoachBen  "south to north" no of vehicles bar seems a little bit shorter than the "west to east" bar. Shouldn't the answer be west to east instead ?
Especially if you expand the visual you can clearly see the west to east bar is longer.

Anonymous · Answer

So, even for the first blank we should consider the "entered the intersection" as a separate part and seek for which of the four groups has the most (in number) long bars and since south has all 3 whereas north has 2, we choose south. And then for the second one we essentially do the same but only for those entered from south.

Gemmie · Answer

During the hour, the greatest number of vehicles entered the intersection from the  , and among those vehicles entering the intersection from that direction, the greatest number of vehicles exited the intersection to the

1. The greatest number of vehicles entered the intersection from the

It can easily be seen that all three bars with "Entered from" South are among the top highest

2. Among those vehicles entering the intersection from that direction, the greatest number of vehicles exited the intersection to the

Among those 3 bars with "Entered from" South, that "Exited to" North is the longest

sayan640 · Answer

You are just checking one bar ...consider all the bars from each category...The total will be highest for the "South"..Hope it helps.

kanikaa9 · Answer

It is very important to remember one thing "Most of the DI questions have language traps" so be very careful.

In this graph, there is no way to tell how many vehicles entered and exited but we have #s in combination. Hence, noticing this and then reading the question "greatest number of vehicles entering.... " it would definitely be south and then most vehicles exit from North.

So, South and north it is.

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In order to better control traffic at a certain busy intersection, a s

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In order to better control traffic at a certain busy intersection, a s

Prep Toolkit

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