If a number is drawn at random from the first 1000 positive integers, what is the probability of selecting a refined number?
(1)Any refined number must be divisible by 22
(2)A refined number is any even multiple of 11
Odd Problem
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- mehrasa
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I did not solve the problem mathematically.. but i think each statement alone is sufficient... since both set of refined No. are the same and we can find out the number of ech even to find the probability
IMO:D
IMO:D
- sl750
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Statement 1
Refined numbers could be 22,44,66.....990 We can find the probability of selecting a refined number. Sufficient
Statement 2
Even multiples of 11 are 22, 44, 66...This is the same as statement 1. Sufficient
Refined numbers could be 22,44,66.....990 We can find the probability of selecting a refined number. Sufficient
Statement 2
Even multiples of 11 are 22, 44, 66...This is the same as statement 1. Sufficient
- gmatboost
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The GMAT would never use an unknown term in a question without defining it in the question itself.
I would answer B to this question, but it is a matter of being very picky about the language and has nothing do to with math, so this is not really a GMAT math question.
(2)A refined number is any even multiple of 11
This actually says that a refined number is a multiple of 22.
Again, not really a GMAT question.
I would answer B to this question, but it is a matter of being very picky about the language and has nothing do to with math, so this is not really a GMAT math question.
This doesn't actually say that a refined number is a multiple of 22. It says it MUST be a multiple of 22, but there might be other conditions we don't know about.(1)Any refined number must be divisible by 22
(2)A refined number is any even multiple of 11
This actually says that a refined number is a multiple of 22.
Again, not really a GMAT question.
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- Brent@GMATPrepNow
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This would be closer to an actual GMAT question if there were some wording in the question stem explaining that "refined numbers" is a fictitious term.
I also have a problem with the term "even multiple." Although the definition might be intuitively apparent, I believe the GMAT test-makers would provide additional text to avoid any ambiguity.
Cheers,
Brent
I also have a problem with the term "even multiple." Although the definition might be intuitively apparent, I believe the GMAT test-makers would provide additional text to avoid any ambiguity.
Cheers,
Brent