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

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Math Expert
Joined: 02 Sep 2009
Posts: 55668
If John buys a stereo marked down 7 percent from its \$650 original pri  [#permalink]

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07 Jan 2019, 05:02
00:00

Difficulty:

5% (low)

Question Stats:

87% (01:17) correct 13% (01:34) wrong based on 35 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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Joined: 30 Dec 2018
Posts: 34
Concentration: International Business, Marketing
Re: If John buys a stereo marked down 7 percent from its \$650 original pri  [#permalink]

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07 Jan 2019, 05:07
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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07 Jan 2019, 05:15
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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07 Jan 2019, 06:55
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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Joined: 15 Aug 2017
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Re: If John buys a stereo marked down 7 percent from its \$650 original pri  [#permalink]

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08 Jan 2019, 04:04
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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Joined: 08 Jan 2019
Posts: 1
Re: If John buys a stereo marked down 7 percent from its \$650 original pri  [#permalink]

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12 Jan 2019, 09:38
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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12 Jan 2019, 11:11
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   [#permalink] 12 Jan 2019, 11:11
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