chetan2u wrote:
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.
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