if a coin is tossed thrice.what is the probability of getting neither 3 heads nor 3 tails ?

In tossing a coin ,the possible outcomes are HHH ,HHT,THH,HTH,THT,TTH,HTT,TTT

therfore,Number of all possible outcomes = 8

 no of favourable outcome of getting neither 3 heads nor 3 tails = 6 

P(E) =  number of favourable outcomes/total outcomes

 =6/8

 =3/4