Probabilities

[Cook10]

A coin is tossed twice. What is the probability of tossing heads?
I believe the answer is 50% but am not sure.

 

[pka]

A coin is tossed twice. What is the probability of tossing heads?
I believe the answer is 50% but am not sure.

Let's make an outcomes table.
\(\begin{array}{*{20}{c}} H&H \\ H&T \\ T&H \\ T&T \end{array}\)
See there are four outcomes.
Now count what you want and then divide by four.

 

[Dr.Peterson]

A coin is tossed twice. What is the probability of tossing heads?
I believe the answer is 50% but am not sure.

What does "tossing heads" mean to you? Heads both times? At least one head? You have to define the event clearly.