the total sample size would be
sample space = [(HHH), (HHT), (HTH), (HTT), (THH), (THT), (TTH), (TTT)]
of X is the no of heads then
P(x=2) mean probability of 2 heads
P(x=2) = (HHT), (HTH), (THH)
P(x=2) =3 ANS
P(x GE 2) mean the probability of appearance of heads equal to or greater then 2
P(x GE 2)= (HHH), (HHT), (HTH), (THH)
P(x GE 2)= 4 ANS
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