If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 3 times, what is the probability that it will land heads up on the first 2 flips and not on the last flip?

Question: If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 3 times, what is the probability that it will land heads up on the first 2 flips and not on the last flip?

Solution:
The probability of landing heads and not landing on heads is same = 1/2
The probability of first two heads =(1/2) × (1/2)
The probability of last landing not on heads = 1/2
The total probability =(1/2) × (1/2) × (1/2)
= 1/ 2³
= 1/8