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Source: — Data Sufficiency |
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Re: Try this one!!!

by dmateer25 » Mon May 25, 2009 5:40 pm
hk wrote:If r + s > 2t, is r > t ?

(1) t > s

(2) r > s
Line them up and add them together.

1) t>s

r + s > 2t
t > s

r + s + t > 2t +s
r + t > 2t
r>t

Suff

2)r > s


r + s > 2t
r > s

2r + s > 2t + s
2r > 2t
r>t

Suff

Choose D
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by hk » Mon May 25, 2009 7:11 pm
good job.. the oa is D

Here is how i did it..

r+s>2t

or (r+s)/2>t , this means that the average of r and s is greater than t.

1) this says that t>s, and the mean is greater than t so r has to be greater than t!!!

2) r>s - this says that r is the greater number and since their mean is greater than t, r definitely is greater than t!!
Wanna know what I'm upto? Follow me on twitter: https://twitter.com/harikrish
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