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What is the value of the ratio of x to y^2?

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What is the value of the ratio of x to y^2?  [#permalink]

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New post Updated on: 19 Jul 2015, 09:09
1
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A
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C
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E

Difficulty:

  15% (low)

Question Stats:

76% (01:12) correct 24% (01:30) wrong based on 94 sessions

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What is the value of the ratio of x to y^2?

(1) The ratio of x^2 to y is 5/3.
(2) The ratio of x to 1 is 5/3.

Originally posted by Balvinder on 27 May 2007, 04:17.
Last edited by Bunuel on 19 Jul 2015, 09:09, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Re: What is the value of the ratio of x to y^2?  [#permalink]

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New post 27 May 2007, 04:25
1
Balvinder wrote:
What is the value of the ratio of x to y2?
(1) The ratio of x2 to y is 5/3.
(2) The ratio of x to 1 is 5/3.



For (C)

x/y^2 = ?

(1) x^2/y = 5/3 => clearly insuff

(2) x/1 = 5/3 => cant say anything about y => insuff

(1) & (2) => x/y^2 = 3/5 => suff
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Re: What is the value of the ratio of x to y^2?  [#permalink]

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New post 01 Mar 2010, 07:19
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What is the value of the ratio of x to y2?
(1) The ratio of x2 to y is 5/3.
(2) The ratio of x to 1 is 5/3.


Required value x/y2.
1 - Gives x2/y = 5/3. Not sufficient.
2 - Gives x = 5/3. Not sufficient.

Combining
(x2/y)2 = x4/y2 = x3 * x/y2
(5/3)2 = (5/3)3 * x/y2
x/y2 = 3/5

SO C.
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Re: What is the value of the ratio of x to y^2?  [#permalink]

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New post 11 Mar 2010, 05:37
Balvinder wrote:
What is the value of the ratio of x to y2?
(1) The ratio of x2 to y is 5/3.
(2) The ratio of x to 1 is 5/3.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient



X2 to y is 5/3 insuff
x to 1 is 5/3 insuff
if we mix bboth
x/1 = 5/3
=> x = 5/3
x^2/y = 5/3
=>(5/3)^2/y = 5/3
=>y = 5/3

x to y^2 = (5/3)/(5/3)^2 = 3/5

so both are req
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New post 22 Apr 2019, 16:40
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Re: What is the value of the ratio of x to y^2?   [#permalink] 22 Apr 2019, 16:40
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