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  # What s the numerical value of 1/a + 1/b + 1/c ? 1) a+b+c =
  
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  Manager
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  What s the numerical value of 1/a + 1/b + 1/c ? 1) a+b+c = [#permalink]
  
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  05 Aug 2003, 05:12
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  What s the numerical value of 1/a + 1/b + 1/c ?
  
  1) a+b+c = 1;
  2) abc = 1.
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  05 Aug 2003, 10:48
  I might be falling for the Joe Bloggs answer here but:
  C
  
  given (2) gives us a common denominator if we were to require adding 1/each = 1
  and (1) gives us the derived numerator = 1
  Thus we have 1/1 as the answer.
  Manager
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  05 Aug 2003, 11:16
  how did u get the derived numerator as a+b+c? Shouldn't it be ab+bc+ca?
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  05 Aug 2003, 21:03
  I will vote with Prashant.
  E. None of the conditions are sufficient.
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  05 Aug 2003, 21:19
  E. I tryed different numbers and got different answers.
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  06 Aug 2003, 02:44
  Konstantin Lynov wrote:
  What s the numerical value of 1/a + 1/b + 1/c ?
  
  1) a+b+c = 1;
  2) abc = 1.
  
  Solution: Let's simplify the equation first. This leads us to (bc+ac+ab)/abc;
  Neither statement one, not two gives us sufficient info to find values for the given equation. Combining two statements together, we get three variables and only two equations. Thus, E is the correct answer.
  _________________
  
  Respect,
  
  KL
  
  Re: DS practice #4   [#permalink] 06 Aug 2003, 02:44
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