Probability by permutation or combination "three unbiased coins are tossed . What is the probability of getting at most two heads ?
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S=( HHH,HHT,HTH,THH,
HTT,THT,TTH,TTT )
n(s) =8
event A=getting at most two heads .
A=( HHH,HHT,HTH,THH,HTT,THT,TTH )
n(A)=7
formula. n(p)= n(A)
n(s)
n(p) = 7
8
HTT,THT,TTH,TTT )
n(s) =8
event A=getting at most two heads .
A=( HHH,HHT,HTH,THH,HTT,THT,TTH )
n(A)=7
formula. n(p)= n(A)
n(s)
n(p) = 7
8
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