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The average of four positive integers is 30, how many

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The average of four positive integers is 30, how many [#permalink] New post 18 Sep 2003, 12:39
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The average of four positive integers is 30, how many integers of
these four are larger than 30?

(1) None of these four integers is more than 60;
(2) Two integers are 9 and 10, respectively.
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Re: DS : Four Positive Integers [#permalink] New post 18 Sep 2003, 15:55
praetorian123 wrote:
The average of four positive integers is 30, how many integers of
these four are larger than 30?

(1) None of these four integers is more than 60;
(2) Two integers are 9 and 10, respectively.



I think the answer is C.

Since the average is 30, the sum of the four +ve integers is 120.

(1) is not sufficient.

Given (2), 120 - 19 = 101. To get 101, u can have combination of 1 + 100 or 50 + 51. So u cannot determine the answer.

Given (1) and (2), u can say for sure that there are 2 integers greater than 30.
Re: DS : Four Positive Integers   [#permalink] 18 Sep 2003, 15:55
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