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If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss

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Math Expert
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Joined: 02 Sep 2009
Posts: 56303
If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss  [#permalink]

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New post 13 Jul 2018, 00:55
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

68% (01:22) correct 32% (01:47) wrong based on 61 sessions

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Retired Moderator
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Joined: 30 Jan 2015
Posts: 805
Location: India
Concentration: Operations, Marketing
GPA: 3.5
Re: If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss  [#permalink]

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New post 13 Jul 2018, 01:04
1
Bunuel wrote:
If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a possible value of c?


Plugging in numbers, we get
c= 9
3b + 2(9) = 18
3b + 18 = 18
3b = 0
b = 0
As per the question b cannot be 0, since bc ≠ 0

Hence, D.
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If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss  [#permalink]

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New post 13 Jul 2018, 06:36
Bunuel wrote:
If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a possible value of c?


A. \(5\frac{3}{5}\)

B. \(6\)

C. \(8\frac{2}{5}\)

D. \(9\)

E. \(12\)



We can use back solving strategy here.

Note :

bc ≠ 0

Neither b nor c is o. ******

Given,

3b + 2c = 18

3b + 2(9) = 18

3b = 0

b = 0.

Thus 9 can be the value of c.


The best answer is D.
GMAT Club Bot
If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss   [#permalink] 13 Jul 2018, 06:36
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If bc ≠ 0, and 3b + 2c = 18, then which of the following is NOT a poss

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