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ds paint shop cans

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ds paint shop cans [#permalink] New post 07 Sep 2004, 01:45
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A
B
C
D
E

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30. A paint shop sells spray cans at a flat charge of 50 cents per can. If a customer bought 10 cans and the owner decided to give that customer a special discount on the last two cans, what was the price of the two discounted cans?

(1) The customer paid four dollars and twenty cents total for the ten cans.

(2) The customer bought the ten cans for an average price of 42 cents per can.

the oa is c
but i think it is d
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 [#permalink] New post 07 Sep 2004, 02:28
I concur with D. C is wrong. What is the source of this question?
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 [#permalink] New post 07 Sep 2004, 02:30
this is from realtestquestion.com doc file
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 [#permalink] New post 07 Sep 2004, 13:01
The answer must be D.

st.1
4,20 = 8 * 0,50 + 2 * x
4,20 = 4,00 + 2x
0,20 = 2x
x = 0,10

st.2
10 * 0,42 = 4,20

I don´t understand why the given answer is C.
I am not familiair with realtestquestion.com.

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Alex
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 [#permalink] New post 07 Sep 2004, 13:56
Oh man. they are horrible, you will find lots of wrong answers.
S
  [#permalink] 07 Sep 2004, 13:56
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