If the average (arithmetic mean) of the five numbers x, 7, : GMAT Data Sufficiency (DS)
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If the average (arithmetic mean) of the five numbers x, 7,

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If the average (arithmetic mean) of the five numbers x, 7, [#permalink]

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30 Jun 2006, 05:46
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If the average (arithmetic mean) of the five numbers x, 7, 2, 16 and 11 is equal to the median of the five numbers, what is the value of x?

(1) 7<x<11
(2) x is the median of the five numbers

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-the-average-arithmetic-mean-of-the-five-numbers-x-103134.html
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30 Jun 2006, 10:14
Simple D.

x = 9 by both statements.
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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

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01 Jul 2006, 13:29
late D...

statement 1
possibility of x = 8,9,10. By trial and error know that x must be 9. SUFF

statement 2
(36+x)/5 = x solve for x and you get 9
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Re: DS - Median and arithemetic mean (from GMATPrep) [#permalink]

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02 Jul 2006, 07:10
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likar wrote:
If the average (arithmetic mean) of the five numbers x, 7, 2, 16 and 11 is equal to the median of the five numbers, what is the value of x?

(1) 7<x<11
(2) x is the median of the five numbers

for (A), plug 8, 9 and 10

8--- 44/5 != integer
9 -- 45/5 = median - solves, SUFF.
10 - 46/5 != integer

so B,C,E are ruled out. Let's look for D.

x is median of 5 numbers is simply rephrasing of the above conditions, and will force the value between 7 and 11. so B is also suff.

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Re: DS - Median and arithemetic mean (from GMATPrep) [#permalink]

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05 May 2013, 20:39
HEEELPPP!!! Why does the median/mean have to be an integer???

necromonger wrote:
likar wrote:
If the average (arithmetic mean) of the five numbers x, 7, 2, 16 and 11 is equal to the median of the five numbers, what is the value of x?

(1) 7<x<11
(2) x is the median of the five numbers

for (A), plug 8, 9 and 10

8--- 44/5 != integer
9 -- 45/5 = median - solves, SUFF.
10 - 46/5 != integer

so B,C,E are ruled out. Let's look for D.

x is median of 5 numbers is simply rephrasing of the above conditions, and will force the value between 7 and 11. so B is also suff.

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Re: DS - Median and arithemetic mean (from GMATPrep) [#permalink]

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05 May 2013, 22:27
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lazeright88 wrote:
HEEELPPP!!! Why does the median/mean have to be an integer???

necromonger wrote:
likar wrote:
If the average (arithmetic mean) of the five numbers x, 7, 2, 16 and 11 is equal to the median of the five numbers, what is the value of x?

(1) 7<x<11
(2) x is the median of the five numbers

for (A), plug 8, 9 and 10

8--- 44/5 != integer
9 -- 45/5 = median - solves, SUFF.
10 - 46/5 != integer

so B,C,E are ruled out. Let's look for D.

x is median of 5 numbers is simply rephrasing of the above conditions, and will force the value between 7 and 11. so B is also suff.

Actually it does not have to be.

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-the-average-arithmetic-mean-of-the-five-numbers-x-103134.htmL
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Re: DS - Median and arithemetic mean (from GMATPrep)   [#permalink] 05 May 2013, 22:27
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