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