Answer is C
Info : r,s,t are real numbers whose sign is unknown, is zero halfway between r & s implying is r =- s ?
Statement (I)
s is right of zero
meaning s &b t are positive. Insuff
Statement (II)
Distance between t & r is same as distance between t & -s
This gives rise to 2 cases
1) r = -s
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=-1 & -s = 1)
Hence Insuff
(I) &(II) together,
Since statement (I) conflicts with case 2 of (II), this leaves only case 1 which implies r=-s and zero lies between them.
Hence Suff
Answer - C
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Is Zero midway S & -S ?
Source: Beat The GMAT — Data Sufficiency |
eaakbari wrote:Answer is C
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=1 & -s = 1)
Hence Insuff
But if distance between t and r is 4 and distance between t and -s is 1...which is voilating statement 2.
It was a typo, I meant t=-1. Have edited the statement.prat_agl wrote:eaakbari wrote:Answer is C
2) There is a number -s on the right hand side of t on the number-line which is equidistant from r. ( Visualize using r = -3, s=-2, t=1 & -s = 1)
Hence Insuff
But if distance between t and r is 4 and distance between t and -s is 1...which is voilating statement 2.
Thanks
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