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Material A costs \$3 per kilogram, and Material B costs \$5 per kilogram

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Status: As cheeks from my insta feed say: soon...
Joined: 17 Jan 2016
Posts: 46
Re: Material A costs \$3 per kilogram, and Material B costs \$5 per kilogram  [#permalink]

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30 Sep 2019, 03:04
Bunuel wrote:
HanoiGMATtutor wrote:
It's clear what the correct answer choice is and how to solve this problem. I think this question is odd. Typically the 2 DS statements do not contrast each other; whereas, in this question, the two statements cannot both be right. Interesting.

Actually the statements do not contradict each other. Consider x = 5.5 and y = 4.5. The would contradict if we assume that a and y are integers but we are not told that they are.

hey Bunuel,

Aren't kilos in this question implied integers?

Thanks
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Joined: 02 Sep 2009
Posts: 58340
Re: Material A costs \$3 per kilogram, and Material B costs \$5 per kilogram  [#permalink]

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30 Sep 2019, 03:09
1
nurba92 wrote:
Bunuel wrote:
HanoiGMATtutor wrote:
It's clear what the correct answer choice is and how to solve this problem. I think this question is odd. Typically the 2 DS statements do not contrast each other; whereas, in this question, the two statements cannot both be right. Interesting.

Actually the statements do not contradict each other. Consider x = 5.5 and y = 4.5. The would contradict if we assume that a and y are integers but we are not told that they are.

hey Bunuel,

Aren't kilos in this question implied integers?

Thanks

Not necessarily. For example, my weight in kilograms is not an integer
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Material A costs \$3 per kilogram, and Material B costs \$5 per kilogram  [#permalink]

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30 Sep 2019, 11:28
1
Weights, lengths, volume, surface area, etc are continuous variables and hence need not be integers.
whereas the number of coins, the number of apples are discrete variables, and hence will always be integers.

nurba92 wrote:
Bunuel wrote:
HanoiGMATtutor wrote:
It's clear what the correct answer choice is and how to solve this problem. I think this question is odd. Typically the 2 DS statements do not contrast each other; whereas, in this question, the two statements cannot both be right. Interesting.

Actually the statements do not contradict each other. Consider x = 5.5 and y = 4.5. The would contradict if we assume that a and y are integers but we are not told that they are.

hey Bunuel,

Aren't kilos in this question implied integers?

Thanks

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Material A costs \$3 per kilogram, and Material B costs \$5 per kilogram   [#permalink] 30 Sep 2019, 11:28

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