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Martin buys a pencil and a notebook for 80 cents. At the same store

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Bunuel
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Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   30 Jun 2015, 04:43
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88% (01:52) correct 12% (02:03) wrong based on 112 sessions
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Martin buys a pencil and a notebook for 80 cents. At the same store, Gloria buys a notebook and an eraser for $1.20, and Zachary buys a pencil and an eraser for 70 cents. How much would it cost to buy three pencils, three notebooks, and three erasers? (Assume that there is no volume discount.)

A. 135
B. 240
C. 270
D. 405
E. 540

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D
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Re: Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   30 Jun 2015, 04:58
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Martin buys a pencil and a notebook for 80 cents. At the same store, Gloria buys a notebook and an eraser for $1.20, and Zachary buys a pencil and an eraser for 70 cents. How much would it cost to buy three pencils, three notebooks, and three erasers? (Assume that there is no volume discount.)

A. 135
B. 240
C. 270
D. 405
E. 540

Solution -

Martin buys -> Pencil+Note=80 ------1
Gloria buys -> Note+Eraser=120 ----2
Zachary buys->Pencil+Eraser=70 ----3

1+2+3, 2Pencil+2Note+2Eraser=270 --> 1Pencil+1Note+1Eraser=135

3Pencil+3Note+3Eraser=405 cents . ANS D
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Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   Updated on: 30 Jun 2015, 09:26
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Algebraic solution:

(p+n)+(e+n)+(p+e) = 80 + 120 + 70
2p+2n+2e = 270
2(p+n+e)=270
(p+n+e) = 135

3(p+n+e) = 405

Answer
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D



Table solution:
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2p+2e+2n.png
2p+2e+2n.png [ 6.08 KiB | Viewed 4260 times ]


Originally posted by kvazar on 30 Jun 2015, 09:23.
Last edited by kvazar on 30 Jun 2015, 09:26, edited 1 time in total.
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Re: Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   30 Jun 2015, 10:27
p+n= 0.8
n+e=1.2
P+e=0.7

add them ,
2p+2n+2e =2.7
hence p+n+e = 1.35

so 3p+3n+3e = 4.05$ i.e. 405 cents

Answer D
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Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   30 Jun 2015, 10:40
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Let pencil=x, notebook=y & eraser =z;
we have x+y=80
y+z=120
x+z=70
adding above 3 equations we get 2(x+y+z)=270 => 3(x+y+z) =405

Hence answer is D
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Re: Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   01 Jul 2015, 22:23
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Hi All,

A similar question (including a table) can be found in the OGs:

in-the-table-above-what-is-the-number-of-green-marbles-in-j-139871.html

GMAT assassins aren't born, they're made,
Rich
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Re: Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink] New post   07 Nov 2023, 12:18
Hello from the GMAT Club BumpBot!

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Re: Martin buys a pencil and a notebook for 80 cents. At the same store [#permalink]
07 Nov 2023, 12:18
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