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Barbata invests $2400 in the National Bank at 5%. How much additional [#permalink] ### Show Tags 04 Mar 2011, 10:10 00:00 Difficulty: (N/A) Question Stats: 80% (01:36) correct 20% (00:56) wrong based on 10 sessions ### HideShow timer Statistics Barbata invests$2400 in the National Bank at 5%. How much additional money must she invest at 8% so that the total annual income will be equal to 6% of her entire investment?

A/ 1200
B/ 3000
C/ 1000
D/ 3600
E/ 2400
[Reveal] Spoiler: OA
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04 Mar 2011, 19:07
in short the question is asking wht additional amnt shud be added so tht the individual interest rates match up 6% of the total.

(x+2400)*6=2400*5+8x.
on solving, x=1200.
option A
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Re: Barbata invests $2400 in the National Bank at 5%. How much additional [#permalink] ### Show Tags 04 Mar 2011, 20:53 120 + 8/100 * x = 6/100 * (x+2400) => (8-6)x/100 = 144 - 120 => x = 2400/2 = 1200 So answer is A. _________________ Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant) GMAT Club Premium Membership - big benefits and savings Re: Barbata invests$2400 in the National Bank at 5%. How much additional   [#permalink] 04 Mar 2011, 20:53
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