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Math Expert V
Joined: 02 Sep 2009
Posts: 59561
What is the value of 1/x + 1/y + 1/z ?  [#permalink]

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Difficulty:   15% (low)

Question Stats: 88% (00:46) correct 12% (01:51) wrong based on 50 sessions

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What is the value of $$\frac{1}{x} + \frac{1}{y} + \frac{1}{z}$$ ?

(1) $$\frac{xy + xz + yz}{xyz}= 4$$

(2) $$x + y=3$$
Senior Manager  G
Joined: 17 Oct 2016
Posts: 305
Location: India
Concentration: Operations, Strategy
GPA: 3.73
WE: Design (Real Estate)
Re: What is the value of 1/x + 1/y + 1/z ?  [#permalink]

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A

Statement 1 directly gives the answer. Sufficient

From statement 2 we don’t know the value of z. Insufficient

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Manager  S
Joined: 23 Sep 2016
Posts: 232
Re: What is the value of 1/x + 1/y + 1/z ?  [#permalink]

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Bunuel wrote:
What is the value of $$\frac{1}{x} + \frac{1}{y} + \frac{1}{z}$$ ?

(1) $$\frac{xy + xz + yz}{xyz}= 4$$

(2) $$x + y=3$$

A is sufficient as if we try to solve question as much as possible then we will form equation same as A whereas B is insufficient as it will only take us to 3Z+XY/XYZ
Manager  G
Status: So far only Dreams i have!!
Joined: 05 Jan 2015
Posts: 139
WE: Consulting (Consulting)
Re: What is the value of 1/x + 1/y + 1/z ?  [#permalink]

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Statement 1 is sufficient straightway.

Statement 2 doesn't get us any output for the expression. Insufficient. Re: What is the value of 1/x + 1/y + 1/z ?   [#permalink] 29 Oct 2019, 05:23
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# What is the value of 1/x + 1/y + 1/z ?  