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by pemdas » Fri Dec 02, 2011 12:49 am
the hell of q.
thanx for posting

r,s E +ve integers, find r?
r=(x/100)s ?
st(1) r=(3/4)s, 3s/4=xs/100 <> 3/4=x/100, x=75 ans 75% Sufficient
st(2) (r/100)*s=75/100 implies rs/100=75/100 OR rs=75. Considering r,s are integers the possible ways for r,s are (3,25) (5,15) (1,75)
3%*25=75/100
5%*15=75/100
...
a
romitvsingh wrote:If r & s are positive integers, r is what percent of s

1) r = 3/4 s

2) r % s = 75/100
(75/100)s=75/100
rs/100=75/100 implies s=1, then r=75
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by Anurag@Gurome » Fri Dec 02, 2011 5:28 am
romitvsingh wrote:If r & s are positive integers, r is what percent of s

1) r = 3/4 s

2) r % s = 75/100
(1) Let r = x% of s and r = 3s/4
3s/4 = x% of s
3 = x/25 or x = 75
So, r is 75% of s; SUFFICIENT.

(2) r + s = 75/100
Let r = x% of s or r = xs/100
So, xs/100 + s = 75/100
xs + 100s = 75
x = (75 - 100s)/s; NOT sufficient as we don't know s.

The correct answer is A.
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by tuanquang269 » Mon Dec 05, 2011 12:22 am
Anurag@Gurome wrote:
romitvsingh wrote:If r & s are positive integers, r is what percent of s

1) r = 3/4 s

2) r % s = 75/100
(1) Let r = x% of s and r = 3s/4
3s/4 = x% of s
3 = x/25 or x = 75
So, r is 75% of s; SUFFICIENT.

(2) r + s = 75/100
Let r = x% of s or r = xs/100
So, xs/100 + s = 75/100
xs + 100s = 75
x = (75 - 100s)/s; NOT sufficient as we don't know s.

The correct answer is A.
I agree with choice A, but your solving is r + s = 75/100. However, the question states that r % S = 75/100
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by Anurag@Gurome » Mon Dec 05, 2011 2:18 am
tuanquang269 wrote:
romitvsingh wrote:If r & s are positive integers, r is what percent of s

1) r = 3/4 s

2) r % s = 75/100
I agree with choice A, but your solving is r + s = 75/100. However, the question states that r % S = 75/100
The actual question says that it should be r + s = 75/100, so I considered it as a typo.
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