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The price of a product is $a. Bill bought s products and

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Director
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The price of a product is $a. Bill bought s products and [#permalink] New post 26 Jan 2005, 14:42
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The price of a product is $a. Bill bought s products and then sold 80 percents of them $b. which of the following represents the whole deal if Bill’s profit was three times the cost?
(a) 0.8sb = 4sa.
(b) (1-0.8)s –ab = 3s.
(c) 3(0.8a – sb) = sa.
(d) (s-0.8s)(b-a) = 3.
(e) (s0.8s) / (b-a) = 3.
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 [#permalink] New post 26 Jan 2005, 15:39
profit = 3 sa
there fore total sale = 3sa + sa = 4sa
the sale was made by selling 0.8s items at the arate of $b . hence.
0.8sb=4sa
Ans A
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 [#permalink] New post 26 Jan 2005, 17:19
Ans is A.

Anyways the grammar is not correct.
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 [#permalink] New post 27 Jan 2005, 13:16
OA is (A)
Did you guys find out this problem is kinda vaguely worded? I mean it said "sold 80 percents of them $b", but it could be understood as "80% for $b" or "%80 for $b per one product (or each)". Also "three times the cost" could mean "three times the cost of s products" or "three times the cost of 80% of s products".

I found this question in realtestquestions.com
I sucked the math part because of grammar mistakes in their tests.
  [#permalink] 27 Jan 2005, 13:16
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The price of a product is $a. Bill bought s products and

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