1heads heads heads 2heads heads tails 3heads tails heads 4heads tails tails 5tails tails tails 6tails tails heads 7tails heads tails 8tails heads heads
There are 26 = 64 possible outcomes.
16
20
It is 1/8 = 0.125
It is 0.3125
There are 26 = 64 possible outcomes.
16
480
20
1 over 16
3
4 HH HT TH TT
Heads or tails; each have a probability of 0.5 (assuming a fair coin).
Do you mean what are all the possible outcomes? Or what is the probability of a certain outcome? Need a little more information.
It is 1/8 = 0.125
It is 0.3125
16