Answer
$P(both~inspectors~do~not~identify)=0.04$
Work Step by Step
The events "inspector 1 does not identify" and "inspector 2 does not identify" are independent.
Now, using the Multiplication Rule (see page 282):
$P(both~inspectors~do~not~identify)=P(inspector~1~does~not~identify)\times P(inspector~2~does~not~identify)=0.2\times0.2=0.04$
