Respuesta :
7/8
Explanation:Probability of getting at least 1 head = 1 - probability of getting no head
The outcome we get from tossing a coin is either a ead or tail
Probability of head = 1/2
probability of getting no head = {TTT} = 1/8
[tex]\text{Possible outcome = }\lbrace\text{HTT}\rbrace,\lbrace THT\rbrace,\lbrace TTH\rbrace,\text{ }\lbrace\text{TTT}\},\lbrace\text{HHH}\rbrace,\lbrace HHT\rbrace,\lbrace HTH\rbrace,\lbrace HHT\rbrace[/tex]Probability of getting at least 1 head = 1 - 1/8
[tex]\begin{gathered} \\ =\text{ }\frac{1}{1}-\frac{1}{8} \\ =\text{ }\frac{8-1}{8} \\ =\text{ 7/8} \\ \end{gathered}[/tex]