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Scoring 715 on the GMAT Focus Edition requires more than just learning formulas, memorizing concepts, or solving hundreds of questions. In this episode, Nishant shares how he improved his GMAT preparation by focusing on application of concepts, and more. 
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30 May 2026, 11:15
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Difficulty:
65%
(hard)
Question Stats:
62% (02:13) correct
38%
(02:09)
wrong
based on 156
sessions
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A medical technology company recently developed an altered design for the prosthetic hip that it produces. The intention behind the development of the new design was to reduce the number of patients whose bodies rejected the prosthetic. The medical trial of the new prosthetic hip showed a ten percent reduction in the number of patients whose bodies rejected the prosthetic. The project managers concluded that the new design did reduce the instance of prosthetic rejection.
Which of the following, if true, casts most doubt on the project managers' conclusion?
A. Further examination of the medical trial showed that the reduction in the number of patients whose bodies rejected the prosthetic could be wholly attributed to a reduction in the number of patients who reported symptoms consistent with the rejection.
B. The initial goal of the redesign project was to reduce the number of patients whose bodies rejected the prosthetic by at least thirty percent.
C. Although some experts have been arguing that the materials used in the company’s prosthetic hips are outdated and must be replaced, the new design does not make any changes in the materials used to build the prosthetics.
D. Since the new prosthetic hip design differs from the original only in the way its components are organized, the cost of the materials used in the prosthetic remains unchanged between designs.
E. During the trials, two thirds of the patients on whose bodies the newly designed prosthetics were implemented were younger than forty years, the age at which the human body’s acceptance of foreign objects begins declining.
Which of the following, if true, casts most doubt on the project managers' conclusion?
A. Further examination of the medical trial showed that the reduction in the number of patients whose bodies rejected the prosthetic could be wholly attributed to a reduction in the number of patients who reported symptoms consistent with the rejection.
B. The initial goal of the redesign project was to reduce the number of patients whose bodies rejected the prosthetic by at least thirty percent.
C. Although some experts have been arguing that the materials used in the company’s prosthetic hips are outdated and must be replaced, the new design does not make any changes in the materials used to build the prosthetics.
D. Since the new prosthetic hip design differs from the original only in the way its components are organized, the cost of the materials used in the prosthetic remains unchanged between designs.
E. During the trials, two thirds of the patients on whose bodies the newly designed prosthetics were implemented were younger than forty years, the age at which the human body’s acceptance of foreign objects begins declining.
30 May 2026, 22:34
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Premise: In the trial, the new prosthetic hip had a 10% lower rejection rate.
Conclusion: Therefore, the new design reduced prosthetic rejection.
Prethinking: The argument assumes that the lower rejection rate was caused by the new design. To weaken it, look for another reason why rejection might have been lower.
Option E says that two-thirds of the patients receiving the new prosthetic were younger than 40, and rejection rates naturally increase with age. So the lower rejection rate could be due to the patients being younger, not because of the new design.
This gives an alternative explanation for the result and casts the most doubt on the conclusion.
Conclusion: Therefore, the new design reduced prosthetic rejection.
Prethinking: The argument assumes that the lower rejection rate was caused by the new design. To weaken it, look for another reason why rejection might have been lower.
Option E says that two-thirds of the patients receiving the new prosthetic were younger than 40, and rejection rates naturally increase with age. So the lower rejection rate could be due to the patients being younger, not because of the new design.
This gives an alternative explanation for the result and casts the most doubt on the conclusion.
- A: Doesn't clearly show the reduction wasn't real.
- B: Talks about the target (30%), not whether the design worked.
- C: Just says materials didn't change; design changes could still help.
- D: Cost is irrelevant.
- E: Best answer.
31 May 2026, 13:33
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A medical technology company recently developed an altered design for the prosthetic hip that it produces. The intention behind the development of the new design was to reduce the number of patients whose bodies rejected the prosthetic. The medical trial of the new prosthetic hip showed a ten percent reduction in the number of patients whose bodies rejected the prosthetic. The project managers concluded that the new design did reduce the instance of prosthetic rejection.
new design for the prosthetic hip.
intention was to reduce the number of patients whose bodies rejected the prosthetic.
trial showed a 10% reduction in num of patients whose bodies rejected the prosthetic.
Conclusion- new design did reduce the instance of prosthetic rejection.
Which of the following, if true, casts most doubt on the project managers' conclusion?
A. Further examination of the medical trial showed that the reduction in the number of patients whose bodies rejected the prosthetic could be wholly attributed to a reduction in the number of patients who reported symptoms consistent with the rejection.
this talks about symptoms and nothing related with rejection. reject.
B. The initial goal of the redesign project was to reduce the number of patients whose bodies rejected the prosthetic by at least thirty percent.
not concerned about what was the initial target goal in terms of people. reject.
C. Although some experts have been arguing that the materials used in the company’s prosthetic hips are outdated and must be replaced, the new design does not make any changes in the materials used to build the prosthetics.
then this strengthen the argument further. so reject.
D. Since the new prosthetic hip design differs from the original only in the way its components are organized, the cost of the materials used in the prosthetic remains unchanged between designs.
not concerned about the cost of design. reject.
E. During the trials, two thirds of the patients on whose bodies the newly designed prosthetics were implemented were younger than forty years, the age at which the human body’s acceptance of foreign objects begins declining.
this provides alternative reason. it younger body rejects prosthetic normally, then their claim that design was reason is misleading. keep.
new design for the prosthetic hip.
intention was to reduce the number of patients whose bodies rejected the prosthetic.
trial showed a 10% reduction in num of patients whose bodies rejected the prosthetic.
Conclusion- new design did reduce the instance of prosthetic rejection.
Which of the following, if true, casts most doubt on the project managers' conclusion?
A. Further examination of the medical trial showed that the reduction in the number of patients whose bodies rejected the prosthetic could be wholly attributed to a reduction in the number of patients who reported symptoms consistent with the rejection.
this talks about symptoms and nothing related with rejection. reject.
B. The initial goal of the redesign project was to reduce the number of patients whose bodies rejected the prosthetic by at least thirty percent.
not concerned about what was the initial target goal in terms of people. reject.
C. Although some experts have been arguing that the materials used in the company’s prosthetic hips are outdated and must be replaced, the new design does not make any changes in the materials used to build the prosthetics.
then this strengthen the argument further. so reject.
D. Since the new prosthetic hip design differs from the original only in the way its components are organized, the cost of the materials used in the prosthetic remains unchanged between designs.
not concerned about the cost of design. reject.
E. During the trials, two thirds of the patients on whose bodies the newly designed prosthetics were implemented were younger than forty years, the age at which the human body’s acceptance of foreign objects begins declining.
this provides alternative reason. it younger body rejects prosthetic normally, then their claim that design was reason is misleading. keep.
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