The total population of a town, Burex, last year was 200,500, out of

Question

The total population of a town, Burex, last year was 200,500, out of which 40% were above 40 years. This year, the number of people above 40 years is 110,000, which is 50% of total population.
Select for X, the number of people who were part of the population last year but not this year, and select for Y, the number of people who are part of the population this year but not last year, such that both X and Y are consistent with the given information.

Anugmat740 · Accepted Answer

Last Year Population was 200,500.
This Year Population is 2*(110,000) =220,000

Now this year total population = Last year population + (People Born this year) - (People who died last year)

220,000 = 200,500 + Y-X

Y-X =19,500

Using options Y=39,000 and X= 19,500

chetan2u · Answer

Once I made the question, I thought it would be an easy one. However, the timer shows the data otherwise with 86% getting it wrong.

The questions that have very less verbal part require us to read each word carefully.

Let us divide the data in th etwo years being spoken about.....

Last year:  Total = 200,500 and >40 years = 40% of 200500 or 80200.
  Present year:   >40 years = 110000 or 50% of Total population, so Total = 220000.

Change : Final increase of 220000-200500 = 19500.
The number of people who were part of the population last year but not this year means the decrease, and is given as X.
The number of people who are part of the population this year but not last year means the increase, and is given as Y.
Now, if decrease is X, then increase Y = change + decrease = 19500+X

So, we look for the values of X and Y such that the difference is 19500.
 If lower value is 10000, then Y is 29500, but it is not given in option. 
Next, if X is 19500, then Y is 19500+19500 or 39000, which is given in option. Thus 19500 and 39000 are consistent with the given information.

X: 19500
Y: 39000

takias · Answer

Y = 220000-200500 = 19500 Theses many people were there in recent year but not present in previous year
X = 120300 - 110000 = 10000 around (population < 40)

bumpbot · Answer

Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.

The total population of a town, Burex, last year was 200,500, out of

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

My Rewards

X	Y
		10,000
		19,500
		26,500
		29,000
		30,000
		39,000

GMAT Two-part Analysis (TPA) Questions

­The total population of a town, Burex, last year was 200,500, out of

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

My Rewards

The total population of a town, Burex, last year was 200,500, out of