Answer
$0.5$
Work Step by Step
We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$. An orange has 2 hemispheres,a Northern and a Southern. Therefore we have 4 possible outcomes:SS,NN,SN,NS. From these, two opportunities are good for us:SS,NN.Therefore $probability=\frac{2}{4}≈0.5$.
