DebbieChats wrote:

School Administrator: The number of fourteen year olds in Britain who are considered “gifted” – that is who score higher than 90% of their peers on the mandatory secondary school entrance exam (MSEEE) – has increased steadily over the past decade.

If the school administrator’s findings are correct, which of the following can be concluded on the basis of those findings?

This is an inference question so best to stick with the information provided. Just to clear any misunderstandings - there is no information provided about total population size so will assume no change.

Next stimulus states

>90% (gifted) <90% (Not gifted)

10 yrs ago x y

Now a b

Assuming a+b = x+y

Given a>x Implies y>b

With word play only B and C is up for elimination - "can be concluded" rather than "must be true"

(B) The number of British fourteen year olds who are not considered gifted has decreased over the past decade. y>b

yes correct

(C) The number of British fourteen year olds taking the MSEEE has increased over the past decade. (not stated - outside assumption) -

Sticking to specifics is not working out in all cases?

Happy to learn about alternative explanations.

DebbieChats, You have

remarkably removed the irrelevant options.

However, assuming

there is NO information provided about total population size ---so will assume----> no change is an inference

mistake.

Given:The # of gifted ones has increased steadily over the past decade.

Meaning - if the prior count was 100x, now it is MORE THAN 100x

Let's clear out why B is

wrong:

(B) The number of British fourteen-year-olds who are NOT considered gifted has decreased over the past decade.

Before:

Total = 1000

Gifted = 600 | NotGifted = 400

We will ONLY increase the gifted count in 2 different possible scenarios:

After( 1st possible scenario) :

Total = 900

Gifted = 700 | NotGifted = 200 - NotGifted decreased

After( 2nd possible scenario) :

Total = 1200

Gifted = 700 | NotGifted = 500 - NotGifted increased

The count of NotGifted is NOT necessarily either higher or lower.

It's Dicey --------> Thus, OUT!

(C) The number of British fourteen year olds taking the MSEEE has increased over the past decade.

C needs to be TRUE because the gifted count is a subset of The number of British fourteen-year-olds taking the MSEEE count.

Look at this way:

In 2010,

The number of aspirants taking the GMAT exam = 150

The number of students who scored above 700 in GMAT = 150 - 150 students are part of 700-Club

Now, in 2015,

The number of aspirants taking the GMAT exam = Y1

The number of students in 700 club = 200 - 200 students are part of 700-Club

Y1 MUST be >= 150 (it should be >= 200, but we are comparing witht the initial count)

because the The number of students in 700 club is a subset of The number of aspirants taking the GMAT exam.

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