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According to a research of 1000 individuals, 70% of the people who wer

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According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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13 Feb 2017, 21:26
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According to a research of 1000 individuals, 70% of the people who were part of Genco Slimming centre's weight loss program, lost an average of 4 pounds of weight in one month. However the same research also found that 80% of the people, who lost an average of 4 pounds of weight in that month, did not attend Genco Slimming centre's weight loss program.

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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14 Feb 2017, 06:43
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ssr300 wrote:
According to a research of 1000 individuals, 70% of the people who were part of Genco Slimming centre's weight loss program, lost an average of 4 pounds of weight in one month. However the same research also found that 80% of the people, who lost an average of 4 pounds of weight in that month, did not attend Genco Slimming centre's weight loss program.

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program

Let A = 70% of the people who joined weight loss program, lost avg of 4 pounds in that month.
B = 80% of the people who lost an avg of 4 pounds in that month

clearly A is subset of B.

Therefore option D is true,

The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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18 Feb 2017, 06:21
Let x is the number of people who joined the Genco's weight loss program.
Total number of people who joined the Genco's weight loss program and lost an average of 4 pounds of weight in one month = 0.7x
Total number of people who did not join the Genco's weight loss program and lost an average of 4 pounds of weight in one month = (0.7*0.8/0.2) x = 2.8 x (clearly it's greater than x)

So option D
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According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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Updated on: 27 Apr 2017, 21:28
1
Hello Experts,
Abhishek009, mikemcgarry, msk0657, GMATNinja, dentobizz, Nightfury14, ziyuen, MacFauz, carcass, chetan2u, yezz, RaviChandra, GMATNinjaTwo, souvik101990, Gnpth, sallysea, Nevernevergiveup, Narenn, Divyadisha, DensetsuNo, daagh, ScottTargetTestPrep, daviddaviddavid, gauravraos, godot53, malevg, mvictor, sandaki, shekyonline, vitaliyGMAT
VeritasPrepKarishma, sayantanc2k, hotshot02, raghaw, IanStewart
In this question - this is what i did:
# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x
(question doesn't say anything about > 4 pounds but ideally i assume 50%) => 0.35x lost > 4 pounds in month

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y
> 4 pounds => 0.4y

I am not able to figure out how can we say 0.4y > 0.35x?
We don't know what is the exact value of x and y. What am i missing, can someone please clarify?

I also did this:
-----------------lost 4 pounds----------Not lost 4 pounds
Join GSP--------0.7x = 0.2y------------------------------------------x
Not Join GSP--------0.8y------------------------------------------ something
-------------------------y-------------------(1000-y)-----------------1000
So, we can say that:
0.7x = 0.2y
7x = 2y
x/y = 2/7 and y > x

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program

But still as ans is D and question stem doesn't say ANYTHING ABOUT > 4 pounds a month HOW do we know that # of people who lost > 4 pounds without joining GSP is more than those who joined GSP?

Thanks

Originally posted by manishtank1988 on 27 Apr 2017, 21:05.
Last edited by manishtank1988 on 27 Apr 2017, 21:28, edited 3 times in total.
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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27 Apr 2017, 21:06
In this question - this is what i did:
# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x
(question doesn't say anything about > 4 pounds but ideally i assume 50%) => 0.35x lost > 4 pounds in month

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y
> 4 pounds => 0.4y

I am not able to figure out how can we say 0.4y > 0.35x?
We don't know what is the exact value of x and y. What am i missing, can someone please clarify?
Thanks
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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27 Apr 2017, 23:20
manishtank1988 wrote:
In this question - this is what i did:
# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x
(question doesn't say anything about > 4 pounds but ideally i assume 50%) => 0.35x lost > 4 pounds in month

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y
> 4 pounds => 0.4y

I am not able to figure out how can we say 0.4y > 0.35x?
We don't know what is the exact value of x and y. What am i missing, can someone please clarify?
Thanks

# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y , so remaing 0.2y lost weight through GSP,so 0.2y=0.7x

you want to know how 0.4y > 0.35x. Use the above equation,what is 0.35x? it is 0.1y. So 0.4y>0.1y...

Hope it helps
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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28 Apr 2017, 06:29
sandaki wrote:
manishtank1988 wrote:
In this question - this is what i did:
# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x
(question doesn't say anything about > 4 pounds but ideally i assume 50%) => 0.35x lost > 4 pounds in month

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y
> 4 pounds => 0.4y

I am not able to figure out how can we say 0.4y > 0.35x?
We don't know what is the exact value of x and y. What am i missing, can someone please clarify?
Thanks

# of people who are part of GSP - x
70% lost avg. of 4 pounds in month = 0.7x

# of people who lost 4 pounds in month = y
80% lost avg. of 4 pounds in month = 0.8y , so remaing 0.2y lost weight through GSP,so 0.2y=0.7x

you want to know how 0.4y > 0.35x. Use the above equation,what is 0.35x? it is 0.1y. So 0.4y>0.1y...

Hope it helps

sandaki - First of all thanks for your response:
Yes, i did notice that but, here, i am making an ASSUMPTION that 50% lost > 4 pounds and other 50% lost < 4 pounds. Again, this is NOT given to us anywhere in this problem. So it is very well possible that 0.1y > 0.7x (depending on the values of x & y eg y = 100 and x = 10 => 10 > 7 ) & (depending on the values of x & y eg y = 10 and x = 10 => 1 < 7). So this is the thing i don't understand. How can we say D or any option is correct?
I hope i conveyed my confusion. Please let me know what you think!!!
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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06 Jul 2017, 21:27
manishtank1988 wrote:
Hello Experts,
But still as ans is D and question stem doesn't say ANYTHING ABOUT > 4 pounds a month HOW do we know that # of people who lost > 4 pounds without joining GSP is more than those who joined GSP?
[/b][/i][/u]
Thanks

same confusion like MAnish's and so opted out D and choose B
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07 Jul 2017, 02:59
3
1
Analysis of data :
Total = 1000
Assume x out of 1000 -> lost avg weight of 4 pound in one month
80% of x -> lost weight but did not attend weight loss program
Remaning 20% of x -> lost weight but attended the loss program = 70 % of (who attended the program and lost weight) [they are equal]

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month
-Don't know how many attended the weight loss program , only detail we have is how many lost weight who attended. Cannot conclude this

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own
- cannot conclude they might have lose weight by following own diet plan or other factors. Hence cannot be drawn from the paragraph information

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight
-we have no details regarding people who lost "less than average" .Passage only talks about "lost an average" So directly eliminate this option

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program
- conclusion can be drawn from data 80% of x > 20 % of x . CORRECT

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program
- an average "more than 4 pounds" is not mentioned in passsage. Eliminate for same reason as C

Kudos please if explanation helped . Have a good day
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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21 Jul 2017, 05:35
akshata19 wrote:
Analysis of data :
Total = 1000
Assume x out of 1000 -> lost avg weight of 4 pound in one month
80% of x -> lost weight but did not attend weight loss program
Remaning 20% of x -> lost weight but attended the loss program = 70 % of (who attended the program and lost weight) [they are equal]

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month
-Don't know how many attended the weight loss program , only detail we have is how many lost weight who attended. Cannot conclude this

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own
- cannot conclude they might have lose weight by following own diet plan or other factors. Hence cannot be drawn from the paragraph information

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight
-we have no details regarding people who lost "less than average" .Passage only talks about "lost an average" So directly eliminate this option

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program
- conclusion can be drawn from data 80% of x > 20 % of x . CORRECT

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program
- an average "more than 4 pounds" is not mentioned in passsage. Eliminate for same reason as C

Kudos please if explanation helped . Have a good day

Hi akshata19

I dont think you're right. See the text of the question below.

According to a research of 1000 individuals, 70% of the people who were part of Genco Slimming centre's weight loss program, lost an average of 4 pounds of weight in one month. However the same research also found that 80% of the people, who LOST AN AVERAGE OF 4 POUNDS of weight in that month, did not attend Genco Slimming centre's weight loss program.

It is nowhere mentioned that they lost more than average of 4 pounds of weight, which is written in D.

IMHO, the question is either wrong, or incorrectly posted.

mikemcgarry IanStewart, your help is appreciated.
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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27 Apr 2018, 07:13
ShashankDave wrote:
akshata19 wrote:
Analysis of data :
Total = 1000
Assume x out of 1000 -> lost avg weight of 4 pound in one month
80% of x -> lost weight but did not attend weight loss program
Remaning 20% of x -> lost weight but attended the loss program = 70 % of (who attended the program and lost weight) [they are equal]

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month
-Don't know how many attended the weight loss program , only detail we have is how many lost weight who attended. Cannot conclude this

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own
- cannot conclude they might have lose weight by following own diet plan or other factors. Hence cannot be drawn from the paragraph information

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight
-we have no details regarding people who lost "less than average" .Passage only talks about "lost an average" So directly eliminate this option

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program
- conclusion can be drawn from data 80% of x > 20 % of x . CORRECT

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program
- an average "more than 4 pounds" is not mentioned in passsage. Eliminate for same reason as C

Kudos please if explanation helped . Have a good day

Hi akshata19

I dont think you're right. See the text of the question below.

According to a research of 1000 individuals, 70% of the people who were part of Genco Slimming centre's weight loss program, lost an average of 4 pounds of weight in one month. However the same research also found that 80% of the people, who LOST AN AVERAGE OF 4 POUNDS of weight in that month, did not attend Genco Slimming centre's weight loss program.

It is nowhere mentioned that they lost more than average of 4 pounds of weight, which is written in D.

IMHO, the question is either wrong, or incorrectly posted.

mikemcgarry IanStewart, your help is appreciated.

Presence of "more" in the answer choice got me confused and I rejected this answer choice. Does this happen in real GMAT test too?
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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11 Jun 2018, 08:57
Jesus, I took 6 mins to go through all the answer choices in order to make sure D was the correct one.

Any way to solve this kind of Quant question disguised as CR questions faster?
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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13 Jun 2018, 12:53
Yes, I have to agree with other posters, the answers do not seem right.

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15 Sep 2018, 00:57
I try to solve these questions by using the two table- overlapping set method.

Program Lost avg 4 lbs. ( Didnt lose avg 4 lbs) TOTAL
Genco 0.7X 0.3X X
Non-Genco 0.8Y (A) 1000-X
Total Y 1000-Y 1000

So D) is saying is A>0.3X
A=1000-Y-0.3X
Therefore A>0.3X
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Re: According to a research of 1000 individuals, 70% of the people who wer  [#permalink]

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15 Sep 2018, 01:43
akshata19 wrote:
Analysis of data :
Total = 1000
Assume x out of 1000 -> lost avg weight of 4 pound in one month
80% of x -> lost weight but did not attend weight loss program
Remaning 20% of x -> lost weight but attended the loss program = 70 % of (who attended the program and lost weight) [they are equal]

Which of the following conclusions can most properly be drawn from the information above?

A. The number of people who were part of Genco's weight loss program is greater than the number of people who lost an average of more than 4 pounds of weight in that month
-Don't know how many attended the weight loss program , only detail we have is how many lost weight who attended. Cannot conclude this

B. The people who did not join Genco's weight loss program and yet managed to lose an average of 4 pounds of weight in a month must have followed a very strict exercise regime of their own
- cannot conclude they might have lose weight by following own diet plan or other factors. Hence cannot be drawn from the paragraph information

C.The number of people who did not join Genco's weight loss program and who lost less than an average of 4 pounds of weight in the month is lower than the number of people who attended Genco's weight loss program and lost less than an average of 4 pounds of weight
-we have no details regarding people who lost "less than average" .Passage only talks about "lost an average" So directly eliminate this option

D. The number of people who did not join Genco's weight loss program and who still managed to lose an average of more than 4 pounds of weight in that month is greater than the total number of people who joined Genco's weight loss program
- conclusion can be drawn from data 80% of x > 20 % of x . CORRECT

E.The chances of a person losing an average of more than 4 pounds of weight in one month are higher if the person does not join Genco's weight loss program
- an average "more than 4 pounds" is not mentioned in passsage. Eliminate for same reason as C

Kudos please if explanation helped . Have a good day

You'd need a slight modification in your calculations. 0.2 x is the number of people who lost weight and attended the program. However, the stem says "total number of people attending the program" hence you'd have to divide 0.2x by 0.7 to get the "number of people attending the program"

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Re: According to a research of 1000 individuals, 70% of the people who wer   [#permalink] 15 Sep 2018, 01:43
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