Mechmeera wrote:For her customer feedback score, Jess wants to average at or above an 8.0 rating. For the month of June, she received the following scores: 7, 8, 8, 7, 9, 10, 6, 6, 8 and 7. By what percent did she fall short of her goal?
(A) 4%
(B) 5%
(C) 8%
(D) 10%
(E) 12%
Jess wants the average of her 10 scores in June to be 8.
Thus, the desired sum for the 10 scores = (number of scores)(desired average) = 10*8 = 80.
List the 10 scores in order:
6, 6, 7, 7, 7, 8, 8, 8, 9, 10.
Actual sum of the 10 scores = (2*6) + (3*7) + (3*8) + 9 + 10 = 12+21+24+9+10 = 76.
Since 76 is 4 points short of her goal of 80, the shortfall percentage = (shortfall)/(desired sum) * 100 = (4/80) * 100 = 5.
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
