Answer
$P(less~than~1000~grams~and~postterm)=\frac{31}{4,305,340}=0.0000072$
This event is not impossible because $P(less~than~1000~grams~and~postterm)\gt0$
Work Step by Step
The sample space: $4,305,340$ babies born in 2007. So, $N(S)=4,305,340$
According to the cell in the first row, third column: $N(less~than~1000~grams~and~postterm)=31$
Using the Empirical Approach (page 258):
$P(less~than~1000~grams~and~postterm)=\frac{N(less~than~1000~grams~and~postterm)}{N(S)}=\frac{31}{4,305,340}=0.0000072$
This event is not impossible because $P(less~than~1000~grams~and~postterm)\gt0$
