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What is the value of x in 11, 15, 17, 18, and x? 1) The median of them

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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 4133

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What is the value of x in 11, 15, 17, 18, and x? 1) The median of them [#permalink]

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14 Sep 2017, 00:51
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Difficulty:

35% (medium)

Question Stats:

56% (00:47) correct 44% (01:02) wrong based on 36 sessions

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[GMAT math practice question]

What is the value of x in 11, 15, 17, 18, and x?

1) The median of them is 15
2) The range of them is 7
[Reveal] Spoiler: OA

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Kudos [?]: 2893 [0], given: 0

Manager
Joined: 02 Nov 2015
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Kudos [?]: 23 [0], given: 121

GMAT 1: 640 Q49 V29
Re: What is the value of x in 11, 15, 17, 18, and x? 1) The median of them [#permalink]

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14 Sep 2017, 00:56
Statement 1: x can be 12 or 13 or 14 or any decimal .
Statement 2: again x can take any above mentioned values.

Both together:

Still x can take 12 or 13 or 14.

Sent from my Lenovo TAB S8-50LC using GMAT Club Forum mobile app

Kudos [?]: 23 [0], given: 121

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 4133

Kudos [?]: 2893 [0], given: 0

GPA: 3.82
Re: What is the value of x in 11, 15, 17, 18, and x? 1) The median of them [#permalink]

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17 Sep 2017, 18:42
=>

Condition 1)
x could be any number between 11 and 15.
This is not sufficient.

Condition 2)
x could be any number between 11 and 18.
This is not sufficient.

Condition 1) & 2)
Any number between 11 and 15 satisfy both conditions 1) and 2) together.
They are not sufficient either.

Ans: E
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Kudos [?]: 2893 [0], given: 0

Re: What is the value of x in 11, 15, 17, 18, and x? 1) The median of them   [#permalink] 17 Sep 2017, 18:42
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