I dont know if it is the quickest way...but here is my approach
stmt 1 tells nothing about y
x+y can be less than, equal to or greater than 1 depending on the value of y
insuff
stmt 2 tells nothing about the value of x
x+y can be less than, equal to or greater than 1 depending on the value of x
insuff
To check if 1 and 2 are sufficient,
you need a YES and No to eliminate C
0.70+0 < 1 ........... x+y<1 YES
but 0.879+0.121=1 ...... x+y<1 NO
Hence insuff
E
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what is the quicket way to solve this?
Source: Beat The GMAT — Data Sufficiency |
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jayhawk2001
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Clearly (1) or (2) is insufficient as you need x and y to solve this.rajt wrote:Is there a quick way to solve this, instead of substituting values?
Adding up the equalities
x + y < 73/72
x+y can hence be < 1 or slightly greater than 1 (since 73/72 > 1)
Insufficient and hence E.
