The correct option is C 12
When we toss a coin, there are only two possible outcomes head (H) or tail (T) so the sample space for the coin toss experiment is {H, T}.
∴ Total number of possibe outcomes =2
Favorable outcome ={T}
∴ Number of favorable outcomes =1
Hence, the probability of flipping a coin and getting tail is
P (tail)=Number of favorable outcomesTotal number of possible outcomes
⇒P (tail)=12
Therefore, option (c.) is the correct choice.