Question
Question: A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head...
A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head appearing on fifth toss equals
A
½
B
1/32
C
31/32
D
1/5
Answer
½
Explanation
Solution
Since the trials are independent so the probability that head appears on the fifth toss does not depend upon previous results of the tosses. Hence, required probability = probability of getting head = 1/2.