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Africa's black rhino population in the mid-1970's numbered about 20,00

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Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 25 Jun 2007, 23:39
6
33
00:00
A
B
C
D
E

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Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(A) the estimated population
(B) that of their estimated population
(C) more than the population's estimated amount
(D) more black rhinos than their population estimate
(E) more than that of their population's estimated amount

Please provide explanations why each answer should be ruled out.
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Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post Updated on: 31 Aug 2018, 23:04
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The easiest way to tackle this is to disregard the plural pronoun ‘their’, which has no place in this context since we are talking of the population of the rhino (a singular). Therefore, B and E are gone. We do not calculate a population in terms of ‘amount’. Therefore, C is gone. In D, the population estimate is weird. The estimated population is the acceptable version. A is the correct choice
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Originally posted by daagh on 22 Jul 2012, 19:18.
Last edited by daagh on 31 Aug 2018, 23:04, edited 1 time in total.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 21 Jul 2012, 13:10
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Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(A) the estimated population
(B) that of their estimated population
(C) more than the population's estimated amount
(D) more black rhinos than their population estimate
(E) more than that of their population's estimated amount


why is B wrong.
isnt the use of THAT neccessary here
the number of rihino in 1970 was ten times THAT of the estimated population.
Why are we eliminating that from the right option?

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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 25 Jun 2007, 23:51
misterJJ2u wrote:
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(b) that of their estimated population
(c) more than the population's estimated amount
(d) more black rhinos than their population estimate
(e) more than that of their population's estimated amount

Please provide explanations why each answer should be ruled out.


I prefer A.

More than is redundant here as ten times already states the inteded meaning.

leaving us A, B choices.

B looks awkward. that of ... of 2000 etc
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 31 May 2011, 12:46
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misterJJ2u wrote:
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(b) that of their estimated population
(c) more than the population's estimated amount
(d) more black rhinos than their population estimate
(e) more than that of their population's estimated amount

Please provide explanations why each answer should be ruled out.


"more than" redundant.
their- pronoun doesn't agree in number.

A best.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 31 May 2011, 22:32
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we can count rhinos so 'amount' does not seem appropriate, hence c and e are out.
d is wordy, and using 'that' in B is wrong. Hence A.

But, i wonder if there is any thing like 'ten times less' ....
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 21 Jul 2012, 13:26
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You are comparing rhino population in the mid-1970's and the estimated population 1997 here.Now when you say "that of their estimated population, "that" must refer to something which is worth comparing with the past population.As you can find out that there is no such antecedent, "that" is unfit here
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 21 Jul 2012, 13:33
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gmatcallow wrote:
You are comparing rhino population in the mid-1970's and the estimated population 1997 here.Now when you say "that of their estimated population, "that" must refer to something which is worth comparing with the past population.As you can find out that there is no such antecedent, "that" is unfit here



is it because the population of 1997 is already mentioned here, that the use THAT is redundant?

had it been something like this

Africa's black rhino population in the mid-1970's numbered about 20,000, ten times THAT of 1997.

would it be correct?
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 21 Jul 2012, 13:44
Perfect :)

Try to fit this concept here.

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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 22 Jul 2012, 21:07
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(A) the estimated population
(B) that of their estimated population
(C) more than the population's estimated amount
(D) more black rhinos than their population estimate
(E) more than that of their population's estimated amount

The sentence is comparing the following.

Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

20,000 = No. of the black rhino population vs the estimated population ( = No. of the estimated population )

(B) that of their estimated population = meaning, a number(that) of black rhino(their) estimated population

Since 'black rhino' was adjective form to modify 'population', 'black rhino' can not be referred by any antecedent.
Even without the antecedent problem, 'a number of the black rhino's estimated population' sounds redundant to me.

Please correct my reasoning if wrong.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 10 Jun 2013, 08:50
THE Main problem with D is that
"ten time more than" mean 11 times the population. This is not logic.

"ten time as many as" mean 10 times

is my thinking correct?
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 10 Jun 2013, 09:08
vietmoi999 wrote:
THE Main problem with D is that
"ten time more than" mean 11 times the population. This is not logic.

"ten time as many as" mean 10 times

is my thinking correct?


So you would think!! But surprisingly, I have seen Official questions, where such "mathematical anomalies" are considered acceptable in the correct answer.

D is primarily more verbose than the correct answer A.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 29 Jan 2014, 22:07
Africa’s black rhino population in the mid-1970’s numbered about 2,000, ten times the estimated population of 2,000 in 1997.
A. the estimated population
B. that of their estimated population
C. more than the population’s estimated amount
D. more black rhinos than their population estimate
E. more than that of their population’s estimated amount

Hi.

in choice D, I think that "more black rhinos than" is incorrect because the sentence is comparing real numbers of the animal and the estimated numbers. But, the choice seems to compare the animal and the estimated numbers.

Is my understanding correct?
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 29 Jan 2014, 22:44
Well, I'm not sure what the OA is, I went with (B). I wouldn't pick (D) either, because of wordiness.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 30 Jan 2014, 23:53
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(a) the estimated population--- a quantity compared with another quantity: correct comparison and correct choice.
(b) that of their estimated population ---- The problem is the plural pronoun ‘their’; there is no justification for using a plural
(c) more than the population's estimated amount ---- ‘ten times as x means 10x; ten times ‘more than x’ means 11 x
(d) more black rhinos than their population estimate--- same as C ; in addition the problematic ‘their’
(e) more than that of their population's estimated amount --- same as that of D.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 04 Sep 2014, 03:20
daagh wrote:
(a) the estimated population--- a quantity compared with another quantity: correct comparison and correct choice.
(b) that of their estimated population ---- The problem is the plural pronoun ‘their’; there is no justification for using a plural
(c) more than the population's estimated amount ---- ‘ten times as x means 10x; ten times ‘more than x’ means 11 x
(d) more black rhinos than their population estimate--- same as C ; in addition the problematic ‘their’
(e) more than that of their population's estimated amount --- same as that of D.


Hey ,
i agree with your explanation, but, i think, we further eliminate C and E because they use "amount"
please correct me if i am wrong
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 02 Jan 2015, 23:43
yes adymehta. You can't amount a population. Especially when the question throws such a big hint by quantifying the number. Still if you ask me i made the blunder in picking E :(
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 01 Mar 2017, 18:22
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(a) the estimated population
This version is not perfect, in that "20,000, ten times the estimated population of 2000" is a little awkward and does not make complete sense, but basically it logically compares 20,000 with 2000.

(b) that of their estimated population
This choice has two issues. First there is no logical antecedent for "that". Ten times what of the estimated population? Second, though there are multiple black rhinos in the population of black rhinos, in the sentence itself, there is no logical antecedent for "their".

(c) more than the population's estimated amount
"ten times more" is not logical. The point is that 20,000 is ten times 2,000. "ten times more", if it means anything, means eleven times, and eleven times 2000 is 22,000, not 20,000. "amount" does not correctly refer to a countable number. Also, "the population's estimated amount of 2,000" is awkward and does not clearly convey that the number of rhinos in the population was 2,000.

(d) more black rhinos than their population estimate
This version repeats the "ten times more than" error seen in C, and "their" has no logical antecedent. Also, this version illogically compares "black rhinos" to "their population estimate of 2000".

(e) more than that of their population's estimated amount
This version repeats the "ten times more than" flaw and the "amount" error seen in C. "that" is unnecessary and has no logical antecedent. "their" has no logical antecedent. The entire choice is unnecessarily wordy and does not directly compare 20,000 with 2,000, but rather compares 20,000 with "that of ... 2,000", a comparison that conveys nothing that makes sense.

The best answer is A.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 09 Mar 2017, 10:08
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.

(b) that of their estimated population
(c) more than the population's estimated amount
(d) more black rhinos than their population estimate
(e) more than that of their population's estimated amount

Subject is the population, option B, D and E are out because they are refering to rhinos as subject.Option C is out because it is wrongly constructed also distorts the meaning.

We are left with option A which is alos the correct choice.

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Re: Africa's black rhino population in the mid-1970's numbered about 20,00  [#permalink]

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New post 30 Jun 2017, 21:39
Hi egmat

Bit confused while applying comparison here.
Initial no: In 1997, 2000
Mid 1970: 20,000 (10 times of 2000)

More than phrase in C,D and E suggests value more than 20,000 in mid 1970s which is incorrect.

For (B) does that jump over noun ten times and
noun phrase in the mid-1970's numbered about 20,000, to suggest illogical
comparison between rhino population and esteemed population.

WR,
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00 &nbs [#permalink] 30 Jun 2017, 21:39

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