Is the average (arithmetic mean) of 5 different positive

Oldest

Best Reply

Author

Message

TAGS:

Joined: 22 Nov 2007

Posts: 1108

Followers: 6

Kudos [?]: 80 [0], given: 0

Is the average (arithmetic mean) of 5 different positive [#permalink]

10 Mar 2008, 23:12

Is the average (arithmetic mean) of 5 different positive integers at least 30?

(1) Each of the integers is a multiple of 10.
(2) The sum of the five integers is 160.

Director

Joined: 05 Jan 2008

Posts: 715

Followers: 2

Kudos [?]: 69 [0], given: 0

Re: stat gmatprep [#permalink]

11 Mar 2008, 02:40

Is it B

We need the sum and number of numbers to compute the mean

thus B alone is sufficient
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Joined: 22 Oct 2006

Posts: 1447

Schools: Chicago Booth '11

Followers: 7

Kudos [?]: 136 [0], given: 12

Re: stat gmatprep [#permalink]

11 Mar 2008, 09:29

B

Although A would work too if you do not count 0 as a multiple. But from my understanding it is a multiple.

Joined: 22 Nov 2007

Posts: 1108

Followers: 6

Kudos [?]: 80 [0], given: 0

Re: stat gmatprep [#permalink]

14 Mar 2008, 09:13

terp26 wrote:

B

Although A would work too if you do not count 0 as a multiple. But from my understanding it is a multiple.

can't figure it out but also 1 is suff and oa is d, source gmatprep. Is it a mistake?

Manager

Joined: 02 Mar 2008

Posts: 213

Concentration: Finance, Strategy

Schools: Wharton '14 (D), Booth '14 (D), Sloan '14 (D), CBS '14 (D), Tuck '14 (WL), Darden '14 (A)

Followers: 1

Kudos [?]: 36 [0], given: 1

Re: stat gmatprep [#permalink]

14 Mar 2008, 15:36

Nope, because it mentions POSITIVE integer (0 not included) so D

Director

Joined: 05 Jan 2008

Posts: 715

Followers: 2

Kudos [?]: 69 [0], given: 0

Re: stat gmatprep [#permalink]

16 Mar 2008, 05:30

hmmm

Yes D it should be..

taking the 10,20,30,40,50( the smallest multiples of 10) -> 150/5 =30
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Director

Joined: 01 May 2007

Posts: 809

Followers: 1

Kudos [?]: 37 [0], given: 0

Re: stat gmatprep [#permalink]

19 Mar 2008, 19:41

I knew it was D...If it seems to simple it has to be a gmat trick. A is suff because the question is ATLEAST 30. So the minimum it could be is 10,20,30,40,50...which would give us 30. So yes, suff. Pick any other 5 multiples of 10 and it will always be greater than 30. thats why its suff.

Re: stat gmatprep [#permalink] 19 Mar 2008, 19:41

		Similar topics	Author	Replies	Last post
Similar Topics:	1	Is the average(arithmetic mean) of 5 different positive	bewakoof	17	01 Apr 2006, 16:48
		Is the average (arithmetic mean) of 5 different positive	tarek99	3	10 Dec 2007, 13:03
		If the average (arithmetic mean) of 5 different numbers is	Value	2	01 Jul 2008, 03:16
		If the average (arithmetic mean0 of 5 different numbers is	TheBigCheese	3	05 Jul 2008, 11:08
	1	Is the average (arithmetic mean) of 5 different positive	piyushksharma	8	07 May 2012, 08:55

Is the average (arithmetic mean) of 5 different positive

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

Is the average (arithmetic mean) of 5 different positive

Is the average (arithmetic mean) of 5 different positive

Main navigation

GMAT Resources

Partners

MBA Resources