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A certain jar contained only pennies and nickels. After 3

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Director
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A certain jar contained only pennies and nickels. After 3 [#permalink] New post 03 Jan 2005, 12:14
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A certain jar contained only pennies and nickels. After 3 pennies
were removed, how many nickels remained in the jar?

(1) The original ratio of pennies to nickels in the jar was 7: 4.

(2) After the 3 pennies were removed, the ratio of pennies to nickels in the jar was 3: 2.
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 [#permalink] New post 03 Jan 2005, 12:47
C
From 1: p/n = 7x/4x
From 2: p/n = 3a/2a
Both put together: 7x - 3a = 3
and the nickels from the 2 statements are 4x = 2a => x = 1/2a
Substituting this value in the equation 7x - 3a = 3 will yield a value for x which can be used to compute the number of nickles.
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 [#permalink] New post 04 Jan 2005, 08:17
late.. but yup C .. gives the answer..
  [#permalink] 04 Jan 2005, 08:17
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