To find the probability of getting at least one tail in Tossing a coin three time,let the event is A
we know that Probability = Favourable outcome/total outcome
total outcomes:8
these are
[TTT,TTH,THT,THH,HTT,HTH,HHT,HHH}Favourable outcome of getting at least one tail:7 these are :{TTT,TTH,THT,THH,HTT,HTH,HHT}
Probability of getting at least one tail
p(E) =7/8
