Answer :
The probability of getting heads is:
[tex]0.5.[/tex]Recall that:
[tex]P(not\text{ A\rparen=1-P\lparen A\rparen.}[/tex]Therefore, the probability of not getting heads is:
[tex]P(not\text{ heads\rparen=1-0.5=0.5.}[/tex]Writing the above result as a percentage, we get:
[tex]50\%.[/tex]