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Drug

by reply2spg » Wed Aug 11, 2010 4:28 pm
A certain drug, when taken by patients with high blood pressures, was found to lower the blood pressure to high-normal levels, or from an average of 30 percent to an average of 10 percent above normal. However a survey of patients with normal blood pressures found that almost 80 percent exercised atleast 5 days per week for 30 minutes and maintained a normal blood pressure.
Therefore, the drug is not as affective in reducing blood pressure in patients with high blood pressure as is exercise.

The validity of the above conclusion depends on the truth of which of the following ?

A.None of the patients with high blood pressure exercise regularly.
B. No patient with high blood pressure successfully achieved below-normal levels with drug alone.
C. Patients with normal blood-pressure maintained healthy diets for the duration of the study.
D. Daily exercise has the same effect on the blood pressures in all patients.
E. The drug has little or no effects on patients with normal blood pressures.

OA D. What is wrong with B
Sudhanshu
(have lot of things to learn from all of you)
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by amit_mascot » Thu Aug 12, 2010 12:55 am
I somehow feel when you choose B, You hve just misunderstood what the ques is asking for. (no offences meant)

Here the last sentence says that drug is not as effectives in reducing blood pressure as exercising is.. and this can be said from this sentence - "a survey of patients with normal blood pressures found that almost 80 percent exercised atleast 5 days per week for 30 minutes and maintained a normal blood pressure."

So the conclusion must depent on the fact that - Daily exercise has the same effect on the blood pressures in all patients.

which is mentioned in D.

B talks about the combination of Drug and exercise both to acheive the below-normal levels of Blood pressure. as mentioned in
B- No patient with high blood pressure successfully achieved below-normal levels with drug alone.

So B is cannot be the correct answer.

Hope it answered your question.
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by mankey » Mon Feb 27, 2012 9:36 am
This one is still not clear. Someone please help with a better explanation.

Regards.
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by GmatKiss » Tue Feb 28, 2012 8:13 am
I went with B as well.. Tough one!
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by killer1387 » Wed Feb 29, 2012 12:34 am
drug--> 0.3x to 0.1x
exercise--> maintained x
concl--> exercise is more effective.

to arrive as this conclusion the support author takes is of exercise surveys. If exercise affects patients differently then this supporting argument fails and hence the argument cant stand with the conclusion made.

Now, suppose B is false then it means there are some cases that proves drug is useful. That is ,overall, for exercise there are no flaws (because no patient shoW + or - BP) but for drug case we have flaws (because there are still some patient with 0.1 x) hence this supports the conclusion that exercise is more effective than drug.

Hence D is the BEST apt option here.

hope it helps...!!
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by moki » Sat Mar 03, 2012 10:33 pm
One reason D should be the right is because if D is negated, it could mean that exercising doesn't necessarily have the same effect on every patient. In other words, exercising need not necessarily decrease the blood pressure, it could as well increase it too or keep it from fluctuating.

It is possible that some of the patients with normal blood pressure had low BP but exercising brought it up to normal level. With that possibility, it is necessary for D to be right for the conclusion to make sense.

(I do not know the medical validity of my statement up there but hey.. its GMAT and you're not supposed to bring in that knowledge into the statement!).
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