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A portion of $6600 is invested at a 5% annual return, while

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Senior Manager
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A portion of $6600 is invested at a 5% annual return, while [#permalink] New post 12 Feb 2004, 10:08
A portion of $6600 is invested at a 5% annual return, while
the remainder is invested at a 3% annual return. If the annual
income from the portion earning a 5% return is twice that of
the other portion, what is the total income from the two
investments after one year?

(A) $180
(B) $270
(C) $300
(D) $320
(E) $360

(I do not have the official answer)

Vivek.
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"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

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 [#permalink] New post 12 Feb 2004, 10:27
B) 270
Let X be the portion invested at 5%
Let (6600 - X) the portion invested at 3%
.05X / .03 * [6600 - X] = 2/1
.05X = .06 * [6600-X]
.05X = 396 - .06X
.11X = 396
X = 3600$
6600 - X = 3000$
3600 * .05 + 3000 * .03 = 180 + 90 = 270
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 [#permalink] New post 12 Feb 2004, 10:32
Excellent ..thanks for the explanation Paul...


Vivek.
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"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

  [#permalink] 12 Feb 2004, 10:32
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A portion of $6600 is invested at a 5% annual return, while

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