.5 * .5 *.5 = 1/8 - - the probability to have head is .5 so the probability of tails 1-.5 - then the first time is head the second time is head the third time is tail so .5 * .5 *.5 = 1/8
First of all, we know that the coins has 2 side - head and tail. And the probability of tossing and get head or tail is 50/50 or 1/2. Next, P(getting a head in the first toss): 1/2 P(getting a head in the second toss): 1/2 P(getting a tail in the last toss): 1/2, so the probability of getting heads in the first two trials and Tails in the last trial is 1/2×1/2×1/2 or 1/8 is your final answer. Hope it help!
