If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?

Oldest

Best Reply

Author

Message

TAGS:

Senior Manager

Joined: 22 May 2006

Posts: 384

Location: Rancho Palos Verdes

Followers: 1

Kudos [?]: 7 [0], given: 0

If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y? [#permalink]

14 Jul 2006, 10:10

00:00

Question Stats:

0% (00:00) correct

0% (00:00) wrong

based on 0 sessions

If (y+3)(y-1) â€“ (y-2)(y-1) = r(y-1), what is the value of y?
(1) r2 = 25
(2) r = 5
_________________

The only thing that matters is what you believe.

Manager

Joined: 25 May 2006

Posts: 231

Followers: 1

Kudos [?]: 2 [0], given: 0

[#permalink]

14 Jul 2006, 11:03

-B-

(y+3)(y-1) â€“ (y-2)(y-1) = r(y-1)

Solving for y --> y=(5-r)/(5-r)

St 1 --> INSUFF
r could be 5 or -5. So y could be 0 or 1

ST 2 --> SUFF
with r=5, y=0.
_________________

Who is John Galt?

Manager

Joined: 04 Jul 2006

Posts: 59

Followers: 1

Kudos [?]: 1 [0], given: 0

[#permalink]

14 Jul 2006, 11:11

With r=5, y=1 is still possible. Hence, (2) is not sufficient.

E.

Manager

Joined: 23 Jan 2006

Posts: 199

Followers: 1

Kudos [?]: 0 [0], given: 0

[#permalink]

14 Jul 2006, 11:12

E?

factor stem to:
5(y-1) = r(y-1)

(1) if r=5, y could be anything. if r=-5, y must be 1
(2) same as above.

Manager

Joined: 25 May 2006

Posts: 231

Followers: 1

Kudos [?]: 2 [0], given: 0

[#permalink]

14 Jul 2006, 11:44

Reviewing my approach I'm getting that y=(5-r)/(5-r)

So with St1 I get that when r=5 y=0/0 which is an undefined result, but when r=-5 I got that y=10/10=1.

With St 2 y=undefined result.

So I guess that it should be A.

Need some advice from the smartest people in the room...

_________________

Who is John Galt?

CEO

Joined: 20 Nov 2005

Posts: 2934

Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008

Followers: 7

Kudos [?]: 37 [0], given: 0

[#permalink]

14 Jul 2006, 12:24

E

St1: r is either 5 or -5. If r = 5 then y could be anything. If r is -5 then y = 1: INSUFF

St2: If r = 5 then y could be anything: INSUFF

Combined: r = 5. Then y could be anything : INSUFF
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Manager

Joined: 25 May 2006

Posts: 231

Followers: 1

Kudos [?]: 2 [0], given: 0

[#permalink]

14 Jul 2006, 13:41

Silly mistake.. ups. Agree it should be E
_________________

Who is John Galt?

Senior Manager

Joined: 22 May 2006

Posts: 384

Location: Rancho Palos Verdes

Followers: 1

Kudos [?]: 7 [0], given: 0

[#permalink]

14 Jul 2006, 15:52

This one is quite easy one, but i made silly mistake on this.

Watch out for those mistakes folks.!!

OA is E :thanks

_________________

The only thing that matters is what you believe.

[#permalink] 14 Jul 2006, 15:52

	Similar topics	Author	Replies	Last post
Similar Topics:	(y+3)(y-1) - (y-2)(y-1) = r(y-1) what is the value of y? (1)	buckkitty	5	05 Feb 2007, 08:42
	If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?	GGUY	7	14 Jan 2008, 07:24
	If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?	dominion	3	19 Jan 2008, 11:57
	If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?	carlson2010	3	18 Jun 2008, 15:25
	If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?	nikhilpoddar	4	01 Oct 2008, 01:41

If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?

If (y+3)(y-1) (y-2)(y-1) = r(y-1), what is the value of y?

Main navigation

GMAT Resources

Partners

MBA Resources