grandh01 wrote:Three types of pencils, J,K, and L,
cost $0.05, $0.10, and $0.25 each,
respectively. If a box of 32 of these
pencils costs a total of $3.40 and if
there are twice as many K pencils as L
pencils in the box, how many J
pencils are in the box?
(A) 6
(B) 12
(C) 14
(D) 18
(E) 20
We can plug in the answers, which represent the number of J pencils.
Answer choice C: 14
Cost of 14 J pencils at 5 cents each = 14*5 = 70.
Since there are 32 pencils in total, K+L = 32-14 = 18 pencils.
Since K:L = 2:1 = 12:6, there are 12 K pencils and 6 L pencils.
Cost of 12 K pencils at 10 cents each = 12*10 = 120.
Cost of 6 L pencils at 25 cents each = 6*25 = 150.
Total cost = 70+120+150 = 340.
Success!
The correct answer is
C.
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
