didieravoaka wrote:When 2/3 of the garments in a shipment were inspected, 18 of the garments passed inspection and the remaining 2 garments failed. How many of the uninspected garments must pass inspection in order that 90 percent of the garments in the shipment pass?
A. 10
B. 9
C. 8
D. 7
E. 5
Of the inspected garments, 18 passed and 2 failed, for a total of 20 inspected garments.
Since the inspected garments constitute 2/3 of the shipment, the shipment = 30 garments.
Since 90% percent of the shipment must pass, the total number that must pass = 90% of 30 = 27.
Since 18 of the inspected garments passed, and a total of 27 garments must pass, the number of uninspected garments that must pass = 27-18 = 9.
The correct answer is
B.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at
[email protected].
Student Review #1
Student Review #2
Student Review #3
