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this is official gmat question . can anybody explain why option 1 is wrong
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think of it as a mixture/solution problem. Before you had a solution of 60% concentration and now you add to it a solution that could be 51% concentration. Unless the concentration of the new solution is more than 60%, the resulting fraction will be smaller than or equal to 60%. Does that make it easier to understand?
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this is official gmat question . can anybody explain why option 1 is wrong
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This question is discussed here: https://gmatclub.com/forum/last-year-3- ... 45678.html Hope it helps.

P.S. Please search the form for questions.
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March 29th Quant Question of the Day



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March 29th Verbal Question of the Day



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Problem Solving Butler: March 2025
March 30PS 1PS 2

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PS 1

If \(\frac{x }{ (x – 2)(x + 1) ≤ 0}\), which of the following specifies all the possible values of x ?

A. x < –1
B. 0 ≤ x < 2
C. x ≤ –1 and 0 ≤ x < 2
D. x < –1 and 0 ≤ x < 2
E. x ≤ –1 and x ≥ 2
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PS 2

A set of 19 integers has a median of 31 and a range of 51. What is the lowest possible value of the smallest integer in the set?

A. 30
B. 6
C. 5
D. -20
E. -21
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Critical Reasoning Butler: March 2025
March 30CR 1CR 2

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CR 1

The caretakers at the Schwimmer-Rock Zoo have failed to detect numerous preventable diseases in the zoo’s animals before they became serious. Several other zoos in the country have managed to reduce the mortality rate from preventable diseases among their animals by 15 to 30 percent by instituting mandatory, monthly full-body checkups of each animal. To detect preventable diseases early, thereby reducing animal mortality rates, the Schwimmer-Rock Zoo will institute the same policy.

Which of the following, if true, may potentially be a drawback in the policy of instituting checkups of each animal?

A. In zoos without monthly, full-body checkups, the animal mortality rate is 30 percent above the average mortality rate in all zoos in the country.
B. The zoo’s owners prefer that checkup schedules be set so as to minimize the amount of time that the animals will not be on display.
C. There are more animals in the Schwimmer-Rock Zoo than there are in the zoos that have instituted mandatory, monthly full-body checkups.
D. Newly hired caretakers would find it difficult to conduct so many checkups so often, unless they were provided with additional training.
E. Frequent full-body checkups of all animals would require significant additional expenses and increase pressure on the zoo’s stringent budget.

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CR 2

Which of the following most logically completes the argument?

The classic Greco-Roman style of sculpture most closely associated with ancient Greco-Roman art was widely practiced until the third century. Accounts from Asian travelers describe these sculptures as being painted in bright primary colors. However, all surviving examples of art made in this style have no paint whatsoever, famously being stark-white marble. Nonetheless, it does not follow that the Asian accounts are therefore inaccurate regarding the painting of sculptures, as __________.

A. some accounts from Asian travelers also describe ancient Greco-Roman sculptures produced in other styles as being painted in bright primary colors
B. sculptures produced in this style are far more common in the erstwhile Roman empire than in Asia
C. only one other style of sculpture practiced today uses paints in the same manner as the Asian accounts described the Greco-Roman sculptures as having used
D. the Asian travelers’ accounts of ancient Greco-Roman statuary were written well before the third century
E. the paint used is made of plant pigments that begin to dissolve after a few centuries
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Data Sufficiency Butler: March 2025
March 30DS 1DS 2

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DS 1

At a professional training conference, 44 attendees signed up for the data analytics workshop and 31 signed up for the public speaking workshop. Were at least 60 attendees at the conference?

(1) At least 16 attendees signed up for neither workshop.

(2) 1/4 of the attendees signed up for both workshops.

________________________
DS 2

A stationery store received a shipment of notebooks. When the manager packs the notebooks into cartons that hold 8 notebooks each, 5 notebooks are left unpacked. If the same shipment is packed into cartons that hold 12 notebooks each, how many notebooks will be left unpacked?

(1) If the notebooks are packed into cartons that hold 6 notebooks each, 5 notebooks are left unpacked.

(2) If the notebooks are packed into cartons that hold 10 notebooks each, 5 notebooks are left unpacked.
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Hi very one I have a question for this CR question: (1) The number of accidents at a particular intersection has increased over the past year.
(2) Some officials argue that the increase is due to poor road design.
(3) However, traffic volume at the intersection has also increased significantly during this period.
(4) Increased traffic volume is known to lead to more accidents.
(5) Therefore, the rise in accidents is more likely due to increased traffic than to poor road design. ; would 2 be labelled as Counter premise or would it be labeled as Background information? because a counter premise is something that author concedes/admits or it just needs to oppose the author’s conclusion; by my understanding author must conceded/admit it then its a counter premise; but here it is not conceding therefore should not be counter premise but a BG. Can someone confirm?
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1. Does this statement oppose the conclusion?
2. Is the author actually doing something with it? is this the right definition of Counter premise?
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Problem Solving Butler: March 2025
March 31PS 1PS 2

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PS 1

The average weight of a group of five students was 60 pounds. Three new students joined and the average weight of the group increased by five pounds. If no student weighs more than 90 pounds, what can be the minimum possible weight of the lightest of the three new students?

A. 30
B. 40
C. 50
D. 60
E. 70
______________________
PS 2

In a company, in the year 2016, the sales in December were equal to the total sales during January to May. The average monthly sales during June and July was 25% less than the average monthly sales for the year. The average monthly sales during August to November was 20% more than the average monthly sales for the year. What was the ratio of the sales in December to the average monthly sales for the year?

A. 13 : 10
B. 49 : 20
C. 57 : 20
D. 63 : 20
E. 63 : 10
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Critical Reasoning Butler: March 2025
March 31CR 1CR 2

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CR 1

International collaboration is highly beneficial for businesses. This opinion was asserted by several leaders in the business community while defending their decision to hire foreign consulting firms over domestic ones. “Soliciting the advice of professionals from different geographies has produced new ideas in strategy, operations, and customer service," the leaders said.

The business leaders’ argument as it is presented in the passage above would be most strengthened if which of the following were true?

A. The number of foreign consulting firms hired by domestic businesses has increased more slowly than many foreign business associations would prefer.
B. Due to recent improvements in management practices, many businesses have realized enormous gains in operational efficiency.
C. Customer service standards have been rising in all businesses operated domestically.
D. The biggest growth in domestic businesses has come from companies that market the most innovative products and services.
E. The businesses that worked the most with foreign consulting firms are those that have seen the most innovation and made the most profit.
_______________________
CR 2

Educationist: Many scholars believe that the schools are solely responsible for the decline in reading skills seen in children over the last few decades. However, it is clear that lifestyle changes and shifts in familial behavior have also had a major part to play. In the last two decades, the average time parents spend with children at home has seen a drastic decline, and interviews with hundreds of families showed that a large proportion of this time is spent in non-educational activities such as playing mobile phone games.

In the argument, the portion in boldface plays which of the following roles?

(A) It is the argument’s main conclusion.
(B) It is a finding that the argument tries to explain.
(C) It introduces a judgment opposed by the argument.
(D) It is an explanation that the argument concludes to be accurate.
(E) It provides evidence that supports the argument’s main conclusion.
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Data Sufficiency Butler: March 2025
March 31DS 1DS 2

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DS 1

A campus bookstore bought 60 notebooks for a total of 540 euros. All of the notebooks were sold during a three-week orientation period. The notebooks were sold for 14 euros each in week 1, 11 euros each in week 2, and 8 euros each in week 3. Was the number of notebooks sold in week 1 greater than the number sold in week 3?

(1) Fewer than 20 notebooks were sold in week 2.
(2) The bookstore’s total profit on the notebooks was less than 120 euros.

_______________________
DS 2

At a community arts center with 240 members, every member attended at least one of two programs: studio classes or outdoor workshops. If 25 percent of the members who attended studio classes also attended outdoor workshops, did more than 50 percent of the members attend studio classes?

(1) Fewer than 60 percent of the members attended outdoor workshops.

(2) More than 90 members attended only studio classes.
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Quote:

*xhaxs writes:*
Hi very one I have a question for this CR question: (1) The number of accidents at a particular intersection has increased over the past year.
(2) Some officials argue that the increase is due to poor road design.
(3) However, traffic volume at the intersection has also increased significantly during this period.
(4) Increased traffic volume is known to lead to more accidents.
(5) Therefore, the rise in accidents is more likely due to increased traffic than to poor road design. ; would 2 be labelled as Counter premise or would it be labeled as Background information? because a counter premise is something that author concedes/admits or it just needs to oppose the author’s conclusion; by my understanding author must conceded/admit it then its a counter premise; but here it is not conceding therefore should not be counter premise but a BG. Can someone confirm?
Show more
Hi,
I don’t think counter premise is something that author has to agree later on, not always.
So as you mentioned it could just be opposing author’s point.

2 is more of a opposing view or claim rather than just background information.
Note that road having poor design is a fact, but the officials claiming that that is the reason for increase in accidents is a claim/pov.

P.S. 1 is background information. 3 and 4 are supporting premises for conclusion which is 5.

Let me know if this makes sense. :)
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