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If John buys a stereo marked down 7 percent from its $650 original pri

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If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 07 Jan 2019, 04:02
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

86% (01:08) correct 14% (01:34) wrong based on 28 sessions

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If John buys a stereo marked down 7 percent from its $650 original price while Sally buys the same stereo marked down only 5 percent, how much more does Sally pay for the stereo?

A. $2
B. $12
C. $13
D. $78
E. $618

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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 07 Jan 2019, 04:07
Sally pays 650*95%

That is equal to 617.5

So option E

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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 07 Jan 2019, 04:15
1
Bunuel wrote:
If John buys a stereo marked down 7 percent from its $650 original price while Sally buys the same stereo marked down only 5 percent, how much more does Sally pay for the stereo?

A. $2
B. $12
C. $13
D. $78
E. $618



650*.95-650*.93
= 13
IMO C
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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 07 Jan 2019, 05:55
If John buys a stereo marked down 7 percent from its $650 original price while Sally buys the same stereo marked down only 5 percent, how much more does Sally pay for the stereo?

7% = 5% + 1% + 1%
10% of 650 = 65 ===> 1% of 650 = 6.5
5% of 650 = 65/2 = 32.5

7% of 650 = 32.5 + 6.5 + 6.5 = 45.5
John's Buying Price = 650 - 45.5 =604.5
Sally's Buying Price = 650 - 32.5 =617.5
Difference = 617.5 - 604.5 = $13

Answer Option C is Correct.
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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 08 Jan 2019, 03:04
1
Ana4001 wrote:
Sally pays 650*95%

That is equal to 617.5

So option E

Posted from my mobile device


The question is asking how much moredoes sally pay. Not how much does she pay.
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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 12 Jan 2019, 08:38
You don't need to do all the math (time consuming).
You know:
John buys at 7% discount and Sally at a 5% discount: so Sally will pay (7%-5%) = 2% more than John
1% of 650 = 6.5 ; 2% = 13 (so Sally will pay $13 more)
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Re: If John buys a stereo marked down 7 percent from its $650 original pri  [#permalink]

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New post 12 Jan 2019, 10:11
Bunuel wrote:
If John buys a stereo marked down 7 percent from its $650 original price while Sally buys the same stereo marked down only 5 percent, how much more does Sally pay for the stereo?

A. $2
B. $12
C. $13
D. $78
E. $618

(7% - 5%)*650

= 2%*650

= 13, Answer must be (C) 13
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Re: If John buys a stereo marked down 7 percent from its $650 original pri &nbs [#permalink] 12 Jan 2019, 10:11
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