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01 Jan 2011, 11:48
A seems better .
between A,B........B seem vague
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06 Jul 2011, 05:40
Since published is in the past..ie., she published a report on something that had happened before..so, past perfect needs to be used here..it is correctly used only in option A...the second part of (B) after the semi-colon talks about ..if they are born, which is awkward.
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21 Jul 2011, 11:01
I think A would be correct choice.

According to a study published by Dr. Myrna Weissman, only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four.
(A) only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four [seems correct syntactically and meaning-wise]
(B) only one percent of Americans born before 1905 suffer major depression by the age of seventy-five; if they are born since 1955, six percent become depressed by age twenty-four [incorrect usage of the word suffer; should be suffered. Similarly for become]
(C) of Americans born before 1905, only one percent of them have suffered major depression by age seventy-five, but six percent of those born since 1955 do by the age of twenty-four [have suffered should be had suffered; since 1955 did by..]
[only one percent of them--unnecessary usage of them. omitting it makes the meaning clear as well]
(D) major depression is suffered by the age of seventy-five by only one percent of Americans born before 1905, and by age twenty-four by the six percent born since 1955 [no matching between only one percent and by the six percent;Incorrect sentence construction]
(E) Americans born before 1905 suffer major depression by the age of seventy-five only one percent of the time, but six percent of those born since 1955 did so by age twenty-four [suffer ..did so...No matching of tenses...also the meaning becomes ambiguous..by the age of seventy-five only one percent of the time..are we referring to a period/ passage/ quantity of time?]
Plz clarify between A, B and E....
E seems to be appropriate....????..
In A had is required or not????
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22 Jul 2011, 09:18
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41. According to a study published by Dr. Myrna Weissman, only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four.(A) only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four

Two concepts. 1. Use of semi colon 2. Use of past perfect tense.
Semi colon - Used with two independent clause which should be related to each other.
Past Perfect tense - Started with one point of time in past and should be continuous till another time of past, or its effect should remain till that time.

First let's analyze all options except A.
(B) only one percent of Americans born before 1905 suffer major depression by the age of seventy-five; if they are born since 1955, six percent become depressed by age twenty-four
1. First problem is with tense.
"Suffer" represent present tense so can not refer past.
This has to be in perfect tense because those 1% of americand were still suffering after age of seventy-five
2. Second problem is with Pronoun.
Here "if they are born" referring to the same people "one percent of Americans" but as mentioned later in sentence that now the number is 6% and these people or this group is different from "one percent of Americans".

(C) of Americans born before 1905, only one percent of them have suffered major depression by age seventy-five, but six percent of those born since 1955 do by the age of twenty-four
1. GMAT perfer they in place of them.
2. "Have suffered" means those people are still suffering

(D) major depression is suffered by the age of seventy-five by only one percent of Americans born before 1905, and by age twenty-four by the six percent born since 1955
1. Here first cluase is passive construction ( by x); Suffer is intrasitive verb so we can not have passive sentence with it, or in another words, Major depression can not be suffered by anything.
2. "by age twenty-four by the six percent born since 1955" is not correct construction and meaningless.

(E) Americans born before 1905 suffer major depression by the age of seventy-five only one percent of the time, but six percent of those born since 1955 did so by age twenty-four.
1)If we remove "the age of seventy-five" then remaining sentence is -Americans born before 1905 suffer major depression by only one percent of the time " , okay they only suffer 1% time 99% percent they are out of depression. Wrong meaning.
2)Suffer is in the present tense.

(A) only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four.
Let's assume Americans born before 1905 were = 6000
those born since 1955= 80000
Then sentense is
only one percent of 6000 had suffered major depression by the age of seventy-five; of 8000, six percent had become depressed by age twenty-four.
1. Use of perfect tense because major depression or its effect is continious.
2. Both of these sentences are independent and related as we are talking about americans.

I hope my explanation will help.

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21 May 2013, 22:58
arundas wrote:
I see no body selecting B. Am I missing something very obvious here? Moreover as per Manhattan GMAT a clause after semi-colon be able to stand on its own. So how can A be the correct answer.

(B) only one percent of Americans born before 1905 suffer major depression by the age of seventy-five; if they are born since 1955, six percent become depressed by age twenty-four..

In this question, we are trying to show contrast between people who are born before 1905 and since 1955. The usage of "if" is not very apt, also u can observe that a present tense is usage "Americans born before 1905 suffer major depression" and thus the choice can be eliminated.
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21 May 2013, 22:59
arundas wrote:
I see no body selecting B. Am I missing something very obvious here? Moreover as per Manhattan GMAT a clause after semi-colon be able to stand on its own. So how can A be the correct answer.

(B) only one percent of Americans born before 1905 suffer major depression by the age of seventy-five; if they are born since 1955, six percent become depressed by age twenty-four..

In this question, we are trying to show contrast between people who are born before 1905 and since 1955. The usage of "if" is not very apt, also u can observe that a present tense is used "Americans born before 1905 suffer major depression" and thus the choice can be eliminated.
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22 May 2013, 05:01
I am studying verb form/tense tab
I see that the actions is in the past but B,C,D,E, use verb in present time. so, B,C,D,E are wrong.

is my thinking correct?
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09 Jun 2014, 06:30
Hello from the GMAT Club VerbalBot!

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10 Jun 2014, 08:40
"By the end", "by the age" demand the use of past perfect. But "since" used in context of time demands present perfect.

In the original sentence since and by the age is used together. Is it correct to use past perfect?
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10 Jun 2014, 11:22
In "those born since 1955", "since" means "after". You need to use the past perfect to imply that the Americans became depressed "before" they turned (simple past) 24.

Read the sentence with present perfect:
Of those born after 1955, six percent have become depressed by age 24.

The present perfect is used for actions occurring in this window: past--present. But the Americans did not turn 24 today. You cannot combine the present perfect with markers of the past such as "last week" or "by some (past moment)".

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11 Jun 2015, 03:33
Two events and both are completed in the past. So we need had with the event that happened before ie even 1.

1. People born before 1905 suffered by the age 75 and those born after 1955 depressed by the age 24.

2. Study published

Study published - only one percent of Americans born before 1905 had suffered major
depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four
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14 Jul 2016, 12:18
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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