They are:HHH,
HHT, HTH, THH,
HTT, THT, TTH,
TTT.
TTT, TTH, THT, HTT
1/4 if they are tossed only once.
Two
If they are fair coins, it is 1/16.
The probability is 1/16.
Eight of them.
There are eight (8).
9, you just have to multiply for problems like this
2/9
TTT, TTH, THT, HTT
1/4 if they are tossed only once.
Doubloons
Two
If they are fair coins, it is 1/16.
9
3 out of 8
50/50