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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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Joined: 02 Sep 2009
Posts: 49303
The average of x, y, and z is 40. What is x? (1) y = 2z (2) y + z = 75  [#permalink]

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New post 21 Apr 2017, 00:05
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Difficulty:

  15% (low)

Question Stats:

92% (00:34) correct 8% (00:32) wrong based on 29 sessions

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Joined: 02 Sep 2016
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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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New post 21 Apr 2017, 00:52
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] 21 Apr 2017, 00:52
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