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17 Apr 2011, 04:55
Kudos
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Hi
If the price of a mobile phone of model increased by 15% from last year and the price of a mobile phone of model decreased by 25% from last year, is the current price of a mobile phone of model greater than that of a mobile phone of model ?
Last year, the price of a mobile phone of model B was 10 percent greater than that of a mobile phone of model A
Last year, model A cost $10 more than model B
I'm a bit unsure about answer explanation/choices (1) and (2) in this question. I think both the options should give the price of one model > the other one, because in GMAT there is no inconsistency in answers.
Of course, I too got the answer - D, but not feeling accurate about the options.
(1)
A2 = 1.15A1
B2 = 0.75B1
So is A2 > B2 ?
B1 = 1.1A1
B2 = 0.75 * 1.1A1 = 0.825A1
A2 - B2 = 1.15A1 - 0.825A1
(1) is sufficient
(2)
A1 = B1 + 10
B2 = 0.75A1 - 7.5
A2 - B2 = 1.15A1 - 0.75A1 + 7.5 = 0.40A1 + 7.5 (A1 is positive)
Sufficient.
Answer - D
Opinions ?
Regards,
Subhash
If the price of a mobile phone of model increased by 15% from last year and the price of a mobile phone of model decreased by 25% from last year, is the current price of a mobile phone of model greater than that of a mobile phone of model ?
Last year, the price of a mobile phone of model B was 10 percent greater than that of a mobile phone of model A
Last year, model A cost $10 more than model B
I'm a bit unsure about answer explanation/choices (1) and (2) in this question. I think both the options should give the price of one model > the other one, because in GMAT there is no inconsistency in answers.
Of course, I too got the answer - D, but not feeling accurate about the options.
(1)
A2 = 1.15A1
B2 = 0.75B1
So is A2 > B2 ?
B1 = 1.1A1
B2 = 0.75 * 1.1A1 = 0.825A1
A2 - B2 = 1.15A1 - 0.825A1
(1) is sufficient
(2)
A1 = B1 + 10
B2 = 0.75A1 - 7.5
A2 - B2 = 1.15A1 - 0.75A1 + 7.5 = 0.40A1 + 7.5 (A1 is positive)
Sufficient.
Answer - D
Opinions ?
Regards,
Subhash
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17 Apr 2011, 05:37
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So what should we do for this question ?
