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# What is the value of 1/k + 1/r ? (1) k + r = 20 (2) kr = 64

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Math Expert
Joined: 02 Sep 2009
Posts: 50042
What is the value of 1/k + 1/r ? (1) k + r = 20 (2) kr = 64  [#permalink]

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23 Sep 2018, 21:15
00:00

Difficulty:

15% (low)

Question Stats:

88% (00:29) correct 13% (00:43) wrong based on 40 sessions

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What is the value of $$\frac{1}{k} + \frac{1}{r}$$ ?

(1) $$k + r = 20$$

(2) $$kr = 64$$

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Intern
Joined: 27 Aug 2018
Posts: 3
Re: What is the value of 1/k + 1/r ? (1) k + r = 20 (2) kr = 64  [#permalink]

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26 Sep 2018, 01:48
1/k + 1/r = (k +r)/kr
=> C. Both statements together are sufficient
Director
Joined: 31 Oct 2013
Posts: 652
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: What is the value of 1/k + 1/r ? (1) k + r = 20 (2) kr = 64  [#permalink]

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26 Sep 2018, 04:17
Bunuel wrote:
What is the value of $$\frac{1}{k} + \frac{1}{r}$$ ?

(1) $$k + r = 20$$

(2) $$kr = 64$$

$$\frac{1}{k} + \frac{1}{r}$$

= $$\frac{k+r}{kr}$$

Statement 1 : k + r = 20. NOT sufficient . we don't know the value of kr.

Statement 2 : The same as 1. k + r is unknown.

(1+2) : Sufficient. we have the value of kr and k + r.

Re: What is the value of 1/k + 1/r ? (1) k + r = 20 (2) kr = 64 &nbs [#permalink] 26 Sep 2018, 04:17
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