Let's say Pat's time is x. So x+x/2+3x=162 .2 (for easier calculation)
2x+x+6x=324
9x=324
x=36
So Pat's hours 36, Kate's 18, Mark's 118
108-18=90
D
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Question from GPREP 2
Source: Beat The GMAT — Problem Solving |
P=2K
P=1/3M ==>> 2K=1/3M ===>>> M=6K
P+K+M=164
2K+K+6K= 164 ==>> K=18
The problem is asking to find M-K, so
M-K=6K-K=5K=5*18=90
OA is 90
P=1/3M ==>> 2K=1/3M ===>>> M=6K
P+K+M=164
2K+K+6K= 164 ==>> K=18
The problem is asking to find M-K, so
M-K=6K-K=5K=5*18=90
OA is 90
