The probability is 3/8 = 0.375
The probability is 1/16.
Coins do not have numbers, there is only the probability of heads or tails.
The probability of getting two tails in the first two is 1/4. And it does not matter how many more times the coins are tossed after the first two tosses.
1/4 if they are tossed only once.
The answer depends on how many coins were tossed.
It is 0.25
If they are fair coins, the probability is 0.25