4. If three coins are flipped simultaneously, what is the probability that all three will be heads?
The probability of flipping a heads on one coin is 1/2, since there are two possible outcomes (heads or tails).
Since the coins are flipped simultaneously, the probability of flipping all three heads is (1/2) * (1/2) * (1/2) = 1/8, or 0.125.
Therefore, the probability of all three coins being heads is 0.125 or 12.5%.