x2suresh wrote:
arjtryarjtry wrote:
Is \(\frac{rs}{r + s} \gt \frac{1}{2}\) ?
1. \(r \gt 1\) and \(s \gt 1\)
2. \(r \gt 2\) and \(s \gt 0\)
1. \(r \gt 1\) and \(s \gt 1\)
2. \(r \gt 2\) and \(s \gt 0\)
rewrite the question stem
1/r +1/s<2
1) r>1 x>1
1/r +1/s <2 True
Suffcieint
2) r>2 and s>0
1/r +1/s can be >2 or <2
insuffcient
Will go with A.
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