Answer
$P(A\cup B)=.68$
Work Step by Step
$P(A\cup B)=P(A)+P(B)-P(A\cap B)=.3+.4-.02=.68$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.