December 13, 2018  December 13, 2018 08:00 AM PST 09:00 AM PST What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL. December 14, 2018 December 14, 2018 09:00 AM PST 10:00 AM PST 10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00
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 01 Jul 2017, 02:39
Hi egmatPlease analyze this question in detail. I get confused when there are numbers in comparison. Please help .
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00
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27 Sep 2017, 04:05
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. (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. A small doubt If correct answer is A Then how do we know that TEN TIMES (THE ESTIMATED POPULATION ) of 2000 in 1997 Ten times? What? More or Less? How can we tell that we need more or not? Becoz if we dont use more then it can be TEN TIMES LESS isn't it?
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Africa's black rhino population in the mid-1970's numbered about 20,00
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27 Mar 2018, 07:59
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. daagh GMATNinja Can we eliminate options B and D on the basis of the pronoun that ? "that" takes a singular noun(population). So the sentence looks like "Africa's black rhino population in the mid-1970's numbered about 20,000, ten times population of their estimated population of 2,000 in 1997." Is this a correct approach?
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00
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27 Mar 2018, 08:46
itisSheldon wrote: 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. daagh GMATNinja Can we eliminate options B and D on the basis of the pronoun that ? "that" takes a singular noun(population). So the sentence looks like "Africa's black rhino population in the mid-1970's numbered about 20,000, ten times population of their estimated population of 2,000 in 1997." Is this a correct approach? Yup, that's exactly how I would think of it. The only singular noun "that" could possibly refer back to is the population. So for (B), we get "...ten times the population of their estimated population", exactly as you said. For (E), we get "...ten times more than the population of their population's estimated amount." Both are pretty ridiculous. (And "their" is a problem in both of those too, for whatever it's worth.) The GMAT seems to love using "that" as a pronoun for some reason, so I promise that you'll see this again. 
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00
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14 May 2018, 00:37
GMATNinja Could you please help with my query for pronoun ambiguity. As of now, in reference to GMAT, I feel that Possessive pronoun can refer possessive noun. So, if my understanding is correct, then please tell me whether "their"in this SC problem can refer "Black Rhinos' ". GMATNinja wrote: itisSheldon wrote: 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. daagh GMATNinja Can we eliminate options B and D on the basis of the pronoun that ? "that" takes a singular noun(population). So the sentence looks like "Africa's black rhino population in the mid-1970's numbered about 20,000, ten times population of their estimated population of 2,000 in 1997." Is this a correct approach? Yup, that's exactly how I would think of it. The only singular noun "that" could possibly refer back to is the population. So for (B), we get "...ten times the population of their estimated population", exactly as you said. For (E), we get "...ten times more than the population of their population's estimated amount." Both are pretty ridiculous. (And "their" is a problem in both of those too, for whatever it's worth.) The GMAT seems to love using "that" as a pronoun for some reason, so I promise that you'll see this again.
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00
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14 May 2018, 18:24
gmatacer40 wrote: GMATNinja Could you please help with my query for pronoun ambiguity. As of now, in reference to GMAT, I feel that Possessive pronoun can refer possessive noun. So, if my understanding is correct, then please tell me whether "their"in this SC problem can refer "Black Rhinos' ". Quote: 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 In (B) and (E), there's absolute no chance that "their" could refer to "black rhinos". Why? The phrase "black rhinos" doesn't actually appear in either of those answer choices. We have "Africa's black rhino population" in the non-underlined portion, and that's unambiguously singular. The sentence says "Africa's black rhino population", not "the black rhinos' population". So "their" is wrong in both (B) and (E). In (D), "their" actually HAS to refer to "black rhinos", since it's the only plural noun that appears earlier in the sentence. But that still doesn't make sense: "Africa's black rhino population in the mid-1970's numbered about 20,000, ten times more black rhinos than [the black rhinos'] population estimate." It's pretty messy and illogical to compare the number of black rhinos to "the black rhinos' population estimate." It's also weird to suggest that the rhinos somehow "possess" a population estimate. I hope this helps!
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Beginners' guides to GMAT verbal
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YouTube LIVE verbal webinars
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SC & CR Questions of the Day (QOTDs), featuring expert explanations
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Need an expert reply?
Hit the request verbal experts' reply button -- and please be specific about your question. Feel free to tag @GMATNinja in your post. Priority is always given to official GMAT questions.
Sentence Correction articles & resources
How to go from great (760) to incredible (780) on GMAT SC | That "-ing" Word Probably Isn't a Verb | That "-ed" Word Might Not Be a Verb, Either | No-BS Guide to GMAT Idioms | "Being" is not the enemy | WTF is "that" doing in my sentence?
Reading Comprehension, Critical Reasoning, and other articles & resources
All GMAT Ninja articles on GMAT Club | Using LSAT for GMAT CR & RC |7 reasons why your actual GMAT scores don't match your practice test scores | How to get 4 additional "fake" GMAT Prep tests for $29.99 | Time management on verbal
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Re: Africa's black rhino population in the mid-1970's numbered about 20,00 &nbs
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14 May 2018, 18:24
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