eight
Both rolling and eight or picking three dice from a jar could be possible outcomes of an experiment.
Is possible.
16 outcomes
The answer depends on the country whose currency you are interested in. Different countries use different currencies with different coinage. For example: the US has a 25 cent coin but not 20 cents. The UK has a 20 pence coin but not 25 pence.
There are eight (8).
Eight of them.
There are eight possible outcomes: HHH, HHT, HTT, HTH, THT, TTT, TTH, THH.
eight
Both rolling and eight or picking three dice from a jar could be possible outcomes of an experiment.
Is possible.
d-bags inventing even more sides
In three flips of a fair coin, there are a total of 8 possible outcomes: T, T, T; T, T, H; T, H, T; T, H, H; H, H, H; H, H, T; H, T, H; H, T, T Of the possible outcomes, four of them (half) contain at least two heads, as can be seen by inspection. Note: In flipping a coin, there are two possible outcomes at each flipping event. The number of possible outcomes expands as a function of the number of times the coin is flipped. One flip, two possible outcomes. Two flips, four possible outcomes. Three flips, eight possible outcomes. Four flips, sixteen possible outcomes. It appears that the number of possible outcomes is a power of the number of possible outcomes, which is two. 21 = 2, 22 = 4, 23 = 8, 24 = 16, .... Looks like a pattern developing there. Welcome to this variant of permutations.
16 outcomes
Eight
The 8 coins are: 3 quarters, 2 dimes, 1 nickel and 2 pennies.
Looking at the total possibilities, you have eight different outcomes: TTT TTH THH HHH HHT HTT HTH THT Counting your two heads, one tails, you get a total of 3 possibilities out of 8, or 3/7