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# Number properties

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Intern
Joined: 05 Nov 2017
Posts: 3

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09 Nov 2017, 05:36
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Q.
Each of the 600 elements of Set X is a distinct integer. How many of the integers in Set X are positive odd integers?

(1) Set X contains 150 even integers.
(2) 70% of the odd integers in Set X are positive.

A.
(1) even : 150 then odd : 450 (But among 450, we don't know the number of 'positive' odd integers.)
- insufficient

(2) We don't know nothing about the number of odd re even integers in set X
- insufficient

(1)&(2)
# of Odd is 450 as per (1) and 450*70% is positive odd integers.
Therefore answer is (C)

****My question is why the number of odd is 450?
It could be 450 but isn't it also could be 449 and zero?
How do we know '0' is not included in Set X ?

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Math Expert
Joined: 02 Sep 2009
Posts: 47977

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09 Nov 2017, 05:46
Rachelpaw wrote:
Q.
Each of the 600 elements of Set X is a distinct integer. How many of the integers in Set X are positive odd integers?

(1) Set X contains 150 even integers.
(2) 70% of the odd integers in Set X are positive.

A.
(1) even : 150 then odd : 450 (But among 450, we don't know the number of 'positive' odd integers.)
- insufficient

(2) We don't know nothing about the number of odd re even integers in set X
- insufficient

(1)&(2)
# of Odd is 450 as per (1) and 450*70% is positive odd integers.
Therefore answer is (C)

****My question is why the number of odd is 450?
It could be 450 but isn't it also could be 449 and zero?
How do we know '0' is not included in Set X ?

Discussed here: each-of-the-600-elements-of-set-x-is-a-distinct-integer-how-many-of-120300.html In case of any questions please post in that topic.

The topic is locked and archived.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Number properties &nbs [#permalink] 09 Nov 2017, 05:46
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# Number properties

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