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gmat prep

This topic has 1 member reply
yvonne12 Master | Next Rank: 500 Posts Default Avatar
Joined
07 Feb 2007
Posted:
144 messages

gmat prep

Post Wed Mar 07, 2007 3:26 pm
if n= 1/3 +1/3^2+1/3^3 then N is between

0 and 1/9
1/9 and 1/3
1/3 and 8/9
8/9 and 4/3
4/3 and 2

pls explain

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ssiva Junior | Next Rank: 30 Posts Default Avatar
Joined
13 Feb 2007
Posted:
16 messages
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Post Wed Mar 07, 2007 4:08 pm
1/3 + (1/3)(1/3) + (1/3)(1/3)(1/3) = 0.333 + 0.333/3 + 0.3333/9
= 0.333 + 0.111 + 0.03 = 0.474

It is between 1/3 and 8/9

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