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# In assembling a Bluetooth device,

Author Message
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Intern
Joined: 19 Feb 2013
Posts: 10
Followers: 0

Kudos [?]: 3 [0], given: 1

In assembling a Bluetooth device, [#permalink]  21 Feb 2014, 17:34
00:00

Difficulty:

55% (hard)

Question Stats:

61% (02:50) correct 39% (02:09) wrong based on 36 sessions
In assembling a Bluetooth device, a factory uses one of two kinds of modules. One module costs $6.25 and the other one, that is cheaper, costs$2.50. The factory holds a $70 worth stock of 22 modules. How many of the modules in the stock are of the cheaper kind? (A)4 (B)8 (C)12 (D)16 (E)18 [Reveal] Spoiler: OA Manager Joined: 19 Apr 2013 Posts: 80 Concentration: Entrepreneurship, Finance GMAT Date: 06-05-2015 GPA: 3.88 WE: Programming (Computer Software) Followers: 1 Kudos [?]: 51 [0], given: 9 Re: In assembling a Bluetooth device, [#permalink] 21 Feb 2014, 22:21 anujtsingh wrote: In assembling a Bluetooth device, a factory uses one of two kinds of modules. One module costs$6.25 and the other one, that is cheaper, costs $2.50. The factory holds a$70 worth stock of 22 modules. How many of the modules in the stock are of the cheaper kind?

(A)4
(B)8
(C)12
(D)16
(E)18

It is easy go : consider x is count of costlier module. y is count of cheaper module.

6.25*x + 2.5*y = 70;
x+y = 22;

by solving these two equation we get y = 18
_________________

Thanks,
AB

+1 Kudos if you like and understand.

Re: In assembling a Bluetooth device,   [#permalink] 21 Feb 2014, 22:21
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