In Country Q, 6 different models of passenger automobiles are assemble

Question

https://gmatclub.com/forum/download/file.php?mode=view&id=58007 In Country Q, 6 different models of passenger automobiles are assembled. The graph shows the number of each model assembled, in thousands, for each of the years 2006–2010. Select the option from each drop-down menu that creates the most accurate statement based on the information provided. Rounded to the nearest 5 percent, the number of Model Y cars assembled in Country Q increased by GRAPH_1_PLACEHOLDER percent from 2006 to 2010. From 2007 to 2008, the increase in the number of cars assembled in Country Q was greatest for Model GRAPH_2_PLACEHOLDER . ID: 100363 GID0482.jpg

yoannnesme · Accepted Answer

For question A you can actually find the answer by approximation, to save some time.

The number of Y cars in 2006 is approximately 140. To reach 215 in 2010, the production increased by 75 cars. That's a little more than 50% of what was produced in 2006 (50% of 140 is 70) so the best answer must be B.

Sajjad1994 · Answer

GID0482.jpg Car assembled in 2006: 139,000 Car assembled in 2010: 215,000 Percent change New - Old = 215,000-139,000=76,000 = \frac{76,000}{139,000} *100 = 54.67 % = 55 % Answer: B

Niveditha28 · Answer

Bunuel  - Bunuel , requesting your help to solve the second Question of this Question.In the O.G all models are given in the answer options

I am getting Model X as the answer

aviddd · Answer

We need to find the model for which the number of cars manufactured in 2008 vs. 2007 is the highest. We need to compute the number of cars, not percentage, so it is a straight forward subtraction.

Z: 896 - 779 = 117
Y: 178 - 152 = 26
X: 115 - 93 = 22

When you compute for all models, we figure out, the highest is for model Z.

Hope this helps.

Niveditha28 · Answer

Omg .. how did i miss that.. i took the percentages and missed a point in this question.
Thank you Bunuel.

Posted from my mobile device

Nidhijain94 · Answer

It is greatest increase (absolute value) not %.

vasunanda91 · Answer

Percentage change =   *100

I=139
F=215

*100 =    * 100 = Approx.    * 100 =    *100 = 55%

manrasingh · Answer

Not sure if this is a GMAT trick or not but I was tricked into calculating the % change for the second statement. Maybe because the first statement asked us to find that. I seem to make a lot of misreading mistakes like this in Graphs questions.

abhiroopD · Answer

Same here.

I ended up calculating the percentage increase between 07-08 and marking X. Seems like this is a common error that happens in such questions.

manrasingh · Answer

Something similar I did here - https://gmatclub.com/forum/this-is-a-ti ... 20731.html , very well knowing the answer to both the questions, in the 1st question i marked 8 months - later realised its 8 quarters and not months. so 8 x 3 = 24 . Seems like we have to be cautious of these mistakes.

sriharsha4444 · Answer

Ballparking method for 1st option

215 - 139 = 76

To calculate -> 76/139 -> consider 70/140 -> 50%. Numerator is greater and denominator is slightly lesser -> so the actual fraction must be greater than 50%. 
10% of 139 is 13.9 
so 6 must be slightly less than 5% (slightly less than half of 13.9 or in other words 14). So around 55% ( plus or minus 1% in which case nearest 5% is still 55%)

Dbrunik · Answer

I was totally shocked to find this question in the hard category when going through the official guide so I looked it up here on Gmail club and to my surprise it’s still an 85% level difficulty question. I don’t think that I’m particularly smart but this question seems relatively straightforward. Simply find the percent change for one and for two find the one that had the largest change. They seem to be basic concepts that I would think would belong in the easy category. In comparison to some of the other more challenging data insights questions you’d be lucky to see something like this.

Afiarl · Answer

Im quite confused when it says "rounded to the nearest 5%" --> what does it mean?

I calculated the number at it gave me 54.xx% but I got confused by the term "rounded to the nearest "5%". I mistakenly thought that it needs to be rounded to -/+ 5%, therefore I chose "50%" instead of "55%". Can someone please enlighten? Thank you!

glagad · Answer

"rounded to the nearest "5%" - means your answer should be a multiple of 5% - 50, 55, 60 etc.

This means any value between 53.5 to 55 will be rounded off as 55%
and any value between 50 to 50.35 (Excluded) will be rounded off as 50%

Here the answer becomes B since the value (of actual calculation) is 54.67%

Hope this helps

egmat · Answer

Looking at this stacked bar chart problem, you're dealing with two different types of calculations - a percentage increase over time and finding the largest absolute change. Let me walk you through how to tackle each part efficiently.

Part 1: Percent Increase for Model Y (2006 to 2010)

Let's think about what we need here. You're looking for Model Y's growth, and the key phrase is "rounded to the nearest 5 percent" - this tells us we can work with approximations.

Looking at the chart:
- Model Y in 2006: 139 (remember, it's in thousands, so 139,000)
- Model Y in 2010: 215 (or 215,000)

Here's how you calculate the percent increase:
 	ext{Percent Increase} = \frac{	ext{Final} - 	ext{Initial}}{	ext{Initial}} 	imes 100

= \frac{215 - 139}{139} 	imes 100 = \frac{76}{139} 	imes 100

Notice how  \frac{76}{139}  is a bit more than  \frac{1}{2}  (since  \frac{139}{2} = 69.5 ), so we're looking at something slightly above 50%.

Computing:  \frac{76}{139} \approx 0.547 , which gives us about 54.7%

Rounded to the nearest 5%:  55%

Part 2: Greatest Increase from 2007 to 2008

For this part, you need to check  all six models  and find which had the biggest jump. Here's what you need to see - we're looking for absolute increase, not percentage.

Let me show you the key comparisons:
- Model Z: Goes from 779 to 896 → increase of 117 thousand
- Model Y: Goes from 152 to 178 → increase of 26 thousand
- Model X: Goes from 93 to 115 → increase of 22 thousand
- Model V: Actually  decreases  from 220 to 167

The winner is clearly  Model Z  with an increase of 117,000 units - that's more than 4 times larger than any other model's growth!

---

You can check out the  step-by-step solution on Neuron by e-GMAT  to master the complete framework for handling stacked bar charts and discover the pattern recognition techniques that apply to all data interpretation questions. You can also explore other GMAT official questions with detailed solutions on Neuron for structured practice  here .

siddhantvarma · Answer

KarishmaB  I've the same doubt. What does rounded to the nearest x% generally mean?

Bunuel · Answer

When a question says  “rounded to the nearest 5%” , it simply means you round your calculated percentage to the closest multiple of 5.

For example:

54% is closer to 55% than to 50%, so you round to  55% . 
 52% would round to  50% . 
 58% would round to  60% .

It does  not  mean “within +/-5%” or “plus/minus 5%.” It’s just standard rounding, but instead of rounding to the nearest 1%, you round to the nearest  5% increment .

KarishmaB · Answer

Also, in general terms 'rounding to the nearest 1000' means rounding to 1000 or 2000 or 3000 or 500,000 or 501,000 etc. That is a value of 2678 is rounded to 3000 and 500,891 is rounded to 501,000.
Similarly, a percentage rounded to nearest 5% simply means rounded to 5% or 10% or 15% or 25% etc. So 43% becomes 45% and 61% becomes 60% etc.

bot00078 · Answer

https://gmatclub.com/forum/download/file.php?id=86352 GMAT-Club-Forum-b2hu0mod.png

In Country Q, 6 different models of passenger automobiles are assemble

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

GMAT Graphs and Tables (G&T) Questions

In Country Q, 6 different models of passenger automobiles are assemble

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia