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wat is the value of |x+y| a)|x|=3 b)|y|=2

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Senior Manager
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wat is the value of |x+y| a)|x|=3 b)|y|=2 [#permalink] New post 22 Mar 2004, 19:01
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A
B
C
D
E

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  5% (low)

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100% (01:56) correct 0% (00:00) wrong based on 1 sessions
wat is the value of |x+y|

a)|x|=3
b)|y|=2
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shubhangi

Senior Manager
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 [#permalink] New post 22 Mar 2004, 19:07
recall the traingle inequality: |x+y| <= |x| + |y|

(1) and (2) each alone are not sufficient.
(1) and (2) gives the upper bound of |x+y|

Answer is E
Senior Manager
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 [#permalink] New post 22 Mar 2004, 19:08
Answer is E.
As we don't know the sign of x and y.
  [#permalink] 22 Mar 2004, 19:08
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wat is the value of |x+y| a)|x|=3 b)|y|=2

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