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Senior | Next Rank: 100 Posts
Posts: 66
Joined: Sat Jan 03, 2009 2:05 pm
by rohit9359 » Fri May 01, 2009 6:09 pm
Hi Guyz,

Refer attached. I think even statement (B) is sufficient to solve the Q. Could you please explain why OAis (A)?

Thanks much,
Rohit.
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Source: — Data Sufficiency |
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Sat Aug 09, 2008 6:03 am
GMAT Score:490

by jitendragneogi » Tue May 05, 2009 3:24 pm
St 1.

plugging in the numbers.

210 = 1000 {(1+r/100)^2 - 1}
=> .21 = (1+r/100)^2
=> sqrt (.21) = 1 + r/100
=> r = real number

Sufficient to determine whether r>8.

St 2.

(1+r/100) ^ 2 > 1.15
=> (1 + r/100) > sqrt 1.15 or (1 + r/100) < sqrt 1.15
=> r can be having 2 positive values

Insufficient to determine whether r>8.

IMO A
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