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Source: — Data Sufficiency |
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by 4meonly » Mon Sep 29, 2008 10:16 am
no need to test (1) and (2) alone

Combined

x<8/9
y<1/8
x+y < 73/72
x+y can be =72/72, or 1
x+y can be =70/72, and < 1
x+y can be =72,5/72, and thus > 1
INSUFF

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