Question

If a coin is tossed two times, then what is the probability of getting a head at least once ?

Answer 1

If two coins are tossed, then the total outcomes :

{HH, HT, TH, TT} $\Rightarrow 4$ outcomes

The favourable outcomes of getting at least one head :

{HH, HT, TH} $\Rightarrow 3$ outcomes

Therefore, required probability = $\frac{3}{4}$.