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# Karl invests \$40000 into two different accounts with annual

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Senior Manager
Joined: 01 May 2004
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Location: USA
Karl invests \$40000 into two different accounts with annual [#permalink]

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02 Nov 2004, 16:27
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Karl invests \$40000 into two different accounts with annual interest rates x and y. After a year he got \$4080 interest. Find rate x.
A. x=y*3/4
B. ratio of interst earned on x account to interest earned on y account is 3:2

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Senior Manager
Joined: 21 Jun 2004
Posts: 336

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02 Nov 2004, 21:38
Let me try.
My vote is for D.
Each statement is sufficient.

What do others think?
_________________

510 on my first GMAT. 610 on second GMAT.!
The struggle continues.

Kudos [?]: 15 [0], given: 0

Senior Manager
Joined: 01 May 2004
Posts: 335

Kudos [?]: 117 [0], given: 0

Location: USA

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03 Nov 2004, 10:13
No. Each is not sufficent for sure. Try to write the equations.

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Joined: 31 Dec 1969

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Location: Russian Federation
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 9: 740 Q49 V42
GMAT 11: 500 Q47 V33
GMAT 14: 760 Q49 V44
WE: Supply Chain Management (Energy and Utilities)

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03 Nov 2004, 11:22
A*x/100 + (40000-A)y/100 = 4080

1. x=y*3/4

Since we have 3 variables (A, x and y) and two equations, Insuff.

2. (A*x/100)/[(40000-A)*y/100] = 3/2

Again two equations and 3 variables. Insuff.

combining we have 3 equations and 3 variables. Suff. so,C.

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03 Nov 2004, 11:22
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