1/2 x 1/2 x 1/2 = 1/8 or 0.125 also 12.5%
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2/9
The probabilty of you flipping 3 coins and getting all heads or tails is 0.125 or 1/8.
1 chance in 4
It is the event that one of the two coins lands showing tails and the other shows heads.
Heads ( H ) Tails ( T ) HH , TT , HT , TH