Give a quick stream of consciousness before answering the following question. When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 3 times, what is the probability that it will land once on heads and twice tails?
Options:
(A) 1/3
(B) 1/6
(C) 1/4
(D) 1/8
(E) 1/5
Must be once on heads and twice on tails
1/2*1/2*1/2 = 1/8
The answer: (D).