If you flip three fair coins, what is the probability that you'll get heads on the first two flips and tails on the last flip?

First of all, we know that the coin has two sides - head and tail, do
P(landing on head) first time:
1/2
P(landing on head) second time:
1/2
P(landing on tail) last flip:
1/2. As a result, the probability that you'll get heads on the first two flips and tails on the last flip is 1/2×1/2×1/2=1/8. Hope it help!