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Joined: 27 Feb 2009
Posts: 59
solve [#permalink]

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New post 23 Mar 2009, 20:50
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

G, P, and S are animal species. What is the average life span, in year, of S ?

(1) The average life span of S is twice that of P and that of G.
(2) The average life span of G is 30 years longer than that of P and 10 years longer than that of S.
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Joined: 13 Jan 2009
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Re: solve [#permalink]

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New post 24 Mar 2009, 06:30
kaushik04 wrote:
G, P, and S are animal species. What is the average life span, in year, of S ?

(1) The average life span of S is twice that of P and that of G.
(2) The average life span of G is 30 years longer than that of P and 10 years longer than that of S.


From 1 S=2(p+G)--- not suff
From 2 G=30+P and G=10+S-- not suff

you have 3 eqn with 3 variables. So choose C.
Re: solve   [#permalink] 24 Mar 2009, 06:30
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