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 theoretical probability of HT or TH when two coins are tossed is 1/2 . (All possible outcomes are HH,TT,HT,TH). This means that when we run the experiment repeatedly we expect to get the desired result 1/2 of the time. Since you intend to toss the coins 40 times, 20 are expected.
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.
Doubloons
Two
If they are fair coins, it is 1/16.
9
3 out of 8
50/50