GMAT PREP
This topic has expert replies
Source: Beat The GMAT — Data Sufficiency |
-
gmattester
- Master | Next Rank: 500 Posts
- Posts: 172
- Joined: Wed Oct 31, 2007 11:21 am
- Thanked: 1 times
-
LSB
- Master | Next Rank: 500 Posts
- Posts: 229
- Joined: Thu Nov 08, 2007 3:47 pm
- Thanked: 14 times
- GMAT Score:750
I think I managed to answer my own question.
A: insuff since it only gives us the total along with percentages that apply to subgroups of the total where the split is unknown
B: suff as per the below
M = Male
F = Female
M+F = Total Senior Class
0.75 (M+F) = 0.72M + 0.8F
0.75M + 0.75F = 0.72M + 0.8F
0.03M = 0.05F
M/F = 3/5
M = 3/8
A: insuff since it only gives us the total along with percentages that apply to subgroups of the total where the split is unknown
B: suff as per the below
M = Male
F = Female
M+F = Total Senior Class
0.75 (M+F) = 0.72M + 0.8F
0.75M + 0.75F = 0.72M + 0.8F
0.03M = 0.05F
M/F = 3/5
M = 3/8
