Prep 4

logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pm; Thanked: 237 times; Followed by:25 members; GMAT Score:730

by logitech » Thu Nov 20, 2008 8:50 am

gmat009 wrote:IMO it shud be B, if I am not making any mistake.
In a) cost>30 {insuff}
b) You can calculate n=25{suff}

One more B.

Is $> 33

1) Insuf

2) 33/24 = 1.37

so SUF

B

LGTCH
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rohangupta83: Legendary Member; Posts: 541; Joined: Thu May 31, 2007 6:44 pm; Location: UK; Thanked: 21 times; Followed by:3 members; GMAT Score:680

by rohangupta83 » Fri Nov 21, 2008 3:22 pm

imo B

for 2nd statement

average = 1.36........(1)

or

average = [ $10 + $1(n-1)]/[n].....(2)

from 1 and 2

[10 + (n-1)]/[n] = 1.36

or n = 25

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