Answer
$P(at~least~one~has~not~driven~while~under~the~influence~of~alcohol)=0.975611$
Work Step by Step
The event "at least one has not driven while under the influence of alcohol" is the complement of "all 3 have driven while under
the influence of alcohol". So, we use the Complement Rule (see page 275):
$P(at~least~one~has~not~driven~while~under~the~influence~of~alcohol)=1-P(all~3~have~driven~while~under~the~influence~of~alcohol)=1-0.024389=0.975611$
