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((-1.5)(1.2)-(4.5)(0.4))/30

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BSchool Forum Moderator
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Joined: 05 Jul 2017
Posts: 471
Location: India
GMAT 1: 700 Q49 V36
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((-1.5)(1.2)-(4.5)(0.4))/30  [#permalink]

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New post 07 Jul 2018, 01:22
Hey adkikani

I think you are more confused because 0.4 is rounded to 0.5 whereas all other numbers (Eg: - 1.2 was rounded to 1) followed a different logic while rounding them up?

Think of it this way, 0.4 if it is rounded to 0, then the entire second half of the equation will become 0. Then the answer will be pretty inaccurate.

Hence I think we shouldn't reduce it to zero. Rather keep it as is or make it 0.5

Hope this helps
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Re: ((-1.5)(1.2)-(4.5)(0.4))/30  [#permalink]

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New post 13 Jul 2018, 14:13
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

\(\frac{(-1.5)(1.2)-(4.5)(0.4)}{30}\)

(A) -1.2
(B) -0.12
(C) 0
(D) 0.12
(E) 1.2


Simplifying we have:

(-1.8 - 1.8)/30 = -3.6/30 = -36/300 = -0.12

Answer: B
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Re: ((-1.5)(1.2)-(4.5)(0.4))/30 &nbs [#permalink] 13 Jul 2018, 14:13

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