Answer:
There is 3 out of 4 chance you will get one head.
You are not guaranteed to get a head
Explanation:
Lets determine the sample space
HH HT TH TT
These are the 4 things that can happen when we flip to coins
We want at least one head
3 of the 4 choices have at least 1 head
P (at least one head) = 3/4