The answer depends on the experiment: how many coins are tossed, how often, how many dice are rolled, how often.
The probability is 1/16.
1/2 or 50% (1/8 prob of 0H + 3/8 prob of 1H)
Coins do not have numbers, there is only the probability of heads or tails.
1/4 if they are tossed only once.
3/8
(0.5)n
It is 1/2^7 = 1/128.
The answer depends on the experiment: how many coins are tossed, how often, how many dice are rolled, how often.
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.
The probability is 1/16.
255/256 (complement formula)
The probability of tossing two heads in two coins is 0.25.
1/2 or 50% (1/8 prob of 0H + 3/8 prob of 1H)
Coins do not have numbers, there is only the probability of heads or tails.
1/4 if they are tossed only once.
50/50