Three coins are tossed in succession. What is the probability of heads-tails-heads?

1/2

1/6

1/8

1/8.

Step-by-step explanation:

The probability of of a head (and a tail) in one toss of a coin being obtained is 1/2.

Each toss is independent of the others so we multiply the probabilities.

So Prob (Head - tail - head) = 1/2*1/2*1/2 = 1/8.