I29-13

Question

https://gmatclub.com/gmat-focus-tests/resources/import/img/I29-13.png 
 
The bar chart shows the monthly rainfall, in inches, for three U.S. cities—Chicago, Miami, and Houston—from June through September.
 
From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

The range of rainfall across the three cities was approximately the same for  GRAPH_1_PLACEHOLDER .

The highest average monthly rainfall across the four months for any city was approximately  GRAPH_2_PLACEHOLDER  greater than the lowest average monthly rainfall for any city.

Bunuel · Answer

Official Solution:

Drop-down 1: 
 
The question asks you to find the two months in which the range of rainfall across the three cities is approximately the same. To do this, calculate the difference between the highest and lowest rainfall values for each month. Then identify the highest and lowest averages and compute how much greater the highest is than the lowest, as a percentage. So, we have:
 
 June range:  5.0 (Houston) − 3.0 (Miami) = 2.0
 
 July range:  9.0 (Houston) − 3.0 (Miami) = 6.0
 
 August range:  7.0 (Miami) − 5.0 (Chicago) = 2.0
 
 September range:  5.5 (Miami) − 2.0 (Houston) = 3.5
 
The ranges in June and August are both 2.0 inches.
 
 Drop-down 2: 
 
The question asks you to compare the  average monthly rainfall  across the four months for each city, and determine approximately how much greater the highest city average is than the lowest city average, expressed as a percentage. To solve this, first calculate the average rainfall for each city across all four months. Then, find the highest and lowest averages and compute the percent difference between them.
 
 Chicago average:  (4.0 + 8.5 + 5.0 + 3.0) / 4 = 20.5 / 4 ≈ 5.1
 
 Miami average:  (3.0 + 3.0 + 7.0 + 5.5) / 4 = 18.5 / 4 ≈ 4.6
 
 Houston average:  (5.0 + 9.0 + 7.0 + 2.0) / 4 = 23.0 / 4 ≈ 5.8
 
 Highest average:  ≈ 5.8 (Houston)
 
 Lowest average:  ≈ 4.6 (Miami)
 
 Percent difference:  5.8/4.6 ≈ 1.26 ≈ 25%

Correct answer:

Dropdown 1:  "June and August"

Dropdown 2:  "25%"

Duccio · Answer

I don’t quite agree with the solution. there is no drop down menu

Duccio · Answer

I did not quite understand the question. there isn't any drop down menu, i'm blocked in this question and i can't complete the test

Bunuel · Answer

Thanks for reporting this. We’re looking into it and hope to resolve it as soon as possible.

Bunuel · Answer

The issue has been fixed. Please try again and let us know if you encounter any further problems.

Iserhard · Answer

The range of rainfall across the three cities was approximately the same for? 
 Range of Houston is 7 equal to range of July and September.

Don ́t know if I understood the question.

Bunuel · Answer

The question asks for the range  within each month across the three cities . That means for every single month, you take the highest value among the three cities and subtract the lowest value for that same month.

It does  not  ask for the range within one city across months.

Answer: June and August, both have a 2-inch range across cities.

agrasan · Answer

I like the solution - it’s helpful.

I29-13

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