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A doctor prescribed 18 cubic centimeters

This topic has 4 expert replies and 1 member reply
rsarashi Master | Next Rank: 500 Posts Default Avatar
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A doctor prescribed 18 cubic centimeters

Post Thu Feb 09, 2017 9:25 am
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%

OAD

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shashank.ism Legendary Member
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Post Fri Feb 10, 2017 4:41 am
rsarashi wrote:
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%

OAD
Dose is 2 cc per 15 pound.
Patient weight is 120 pound.
The dose required by patient is 120/15 x 2 = 16 cc

Dose recommended by doctor is 18 cc.
Percentage by which prescribed dose is higher = 2/16 x 100 = 12.5% Answer D

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Post Wed Feb 15, 2017 9:39 am
rsarashi wrote:
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%
The typical dosage is 2 cubic centimeters (cc) per 15 pounds of body weight. We can set up a proportion to determine what the typical number of cc of the drug would be for a patient with a body weight of 120 pounds:

2/15 = x/120

240 = 15x

240/15 = x

16 = x

Thus, the typical dose for this 120-pound patient is 16 cc. To determine the percent greater than this dose that 18 cc would be, we can use the percent change formula.

(Doctor dose - typical dose)/typical dose x 100%

(18 - 16)/16 x 100% = 2/16 x 100% = 0.125 x 100% = 12.5%

Answer: D

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shashank.ism Legendary Member
Joined
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Posted:
1021 messages
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2 members
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41
Test Date:
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GMAT Score:
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Post Fri Feb 10, 2017 4:41 am
rsarashi wrote:
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%

OAD
Dose is 2 cc per 15 pound.
Patient weight is 120 pound.
The dose required by patient is 120/15 x 2 = 16 cc

Dose recommended by doctor is 18 cc.
Percentage by which prescribed dose is higher = 2/16 x 100 = 12.5% Answer D

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http://mba.webmaggu.com - India's social Network for MBA Aspirants

http://deal.webmaggu.com -India's online discount, coupon, free stuff informer.

http://dictionary.webmaggu.com - A compact free online dictionary with images.

Nothing is Impossible, even Impossible says I'm possible.

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Post Wed Feb 15, 2017 9:39 am
rsarashi wrote:
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%
The typical dosage is 2 cubic centimeters (cc) per 15 pounds of body weight. We can set up a proportion to determine what the typical number of cc of the drug would be for a patient with a body weight of 120 pounds:

2/15 = x/120

240 = 15x

240/15 = x

16 = x

Thus, the typical dose for this 120-pound patient is 16 cc. To determine the percent greater than this dose that 18 cc would be, we can use the percent change formula.

(Doctor dose - typical dose)/typical dose x 100%

(18 - 16)/16 x 100% = 2/16 x 100% = 0.125 x 100% = 12.5%

Answer: D

_________________
Jeffrey Miller Head of GMAT Instruction

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Post Thu Feb 09, 2017 9:45 am
rsarashi wrote:
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of the body weight, by what percent was the prescribed dosage greater than the typical dosage?

A) 8%

B) 9%

C) 11%

D) 12.5%

E) 14.8%

OAD
We could also do a little back-solving here. The easiest answer choice to test would be D, as 12.5% converts to a nice fraction, 1/8. If 18 is 1/8 more than the appropriate amount, then 18 is 9/8 of this amount. 18 = (9/8)x --> 16 = x. If the appropriate amount is 16, and the weight is 120, we get a ratio of 16/120 or 2/15. That's what we want! The answer is D

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