$0.969$ This is very likely to happen.
Work Step by Step
First we find the probability of getting all heads: $p=0.5^5=0.031$ The probability of getting at least 1 tail is the complement: $1-0.031=0.969$ This is very likely to happen.
You can help us out by revising, improving and updating this answer.Update this answer
After 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.