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# The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75

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Math Expert
Joined: 02 Sep 2009
Posts: 52161
The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75  [#permalink]

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20 Apr 2017, 23:05
00:00

Difficulty:

15% (low)

Question Stats:

93% (00:35) correct 7% (00:32) wrong based on 32 sessions

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The average of x, y, and z is 40. What is x?

(1) y = 2z
(2) y + z = 75

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Director
Joined: 02 Sep 2016
Posts: 678
Re: The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75  [#permalink]

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20 Apr 2017, 23:52
Statement 2 is sufficient.

x+y+z= 40*3= 120

1) x+3z=120

Not sufficient

2) x+75=120

Sufficient
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Re: The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75 &nbs [#permalink] 20 Apr 2017, 23:52
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