Answer
$P(neither~of~two~alcohol~related)=0.5025$
Work Step by Step
$P(not~alcohol~related)=0.7089$
The events "traffic fatalitie 1 was not alcohol related" and "traffic fatalitie 2 was not alcohol related" are independent.
Now, using the Multiplication Rule (see page 282):
$P(neither~of~two~alcohol~related)=P(traffic~fatalitie~1~was~not~alcohol~related)\times P(traffic~fatalitie~2~was~not~alcohol~related)=0.7089\times0.7089=0.5025$
