A fair coin is tossed two times in succession. The equally likely outcomes is ( HH,HT,TH,TT). Find the probability of getting exactly zero heads.
There is only one outcome in the four possible outcomes that has zero heads: TT (tails, tails).
Since all outcomes are equally likely, the probability of getting exactly zero heads is 1 out of 4.
Therefore, the probability of getting exactly zero heads is 1/4.