Answer
See explanation
Work Step by Step
A) If one event occurs $r$ ways and another $y$ ways, the number of ways both occurs is $r\times y$.
B) $3*5=\boxed{15}$
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.