Answer
See below.
Work Step by Step
If the events are independent, $P(\text{A and B})=P(A)P(B)$.
Hence here the exercise can be to find the probability of obtaining tails twice in a row when tossing a coin twice.
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.