gmat prep-ratio

Question

I've got troubles to answer some of the gmat prep questions. The solutions will be appreciated with kudos

. Thanks for the help

yezz · Answer

let stocks = s , bonds = b
from 1

s/(s+b) , the increase in this ratio could be either by increasing s while or decreasing b....insuff

from 2

s+b increased .. could be S increased or b increased...insuff

both

(s+b) in s/(s+b) increased ( when denominator increase the whole fraction ie: ratio will decrease however from one the ratio increased thus surely s increased to offset and exceed the increase in (s+b)....suff

C

goldgoldandgold · Answer

I think the answer may be okay but I think you are wrong when you say
s/(s+b) = 1+s/b

s/(s+b) = 1+s/b is wrong but (s+b)/s = 1+ s/b is correct

Correct me if I misunderstood

Thanks

flyingbunny · Answer

answer should be C
-
for 1), just consider Ruth holds the same amount of shares, but some companies got delisting.
for 2), alone doesn't mean anything to Ruth

combine 1) and 2), Ruth's share increased.

LenaA · Answer

Statement 1:
Shares/(shares+bonds) increased. If the number of shares does not change but the number of bonds decreases, the ratio increases. So, insufficient since the increase in the ratio could be brought by the decrease in the number of bonds.
Statement 2: S+B increases but we do not know if stocks, bonds or both increased. Insufficient
Combined, the ratio Shares/(Shares + Bonds) increased and the denominator increased. For this to happen, the numerator (the number of shares) must inrease. Combined sufficient.

gmat prep-ratio

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