A fair coin is tossed repeatedly. If head appears on the first four tosses, then the probability of appearance of tail on the fifth toss is.  Choose the correct choice
A) 1/7
B) 1/2
C) 3/7
D) 2/3
E) 1/3
Since the coin is a fair coin, every toss is independent of any other toss. Hence, the probability of appearance of tail on the fifth toss is = 1/2   ANSWER:1/2
<result>B</result>
A fair coin is tossed repeatedly. If head appears on the first four tosses, then the probability of appearance of tail on the fifth toss is.