Simple A fair coin is tossed repeatedly. If head appears on first 4 tosses…
2023
Simple A fair coin is tossed repeatedly. If head appears on first 4 tosses then what is probability of appearance of tail in fifth toss.
- A.
1/5
- B.
275
- C.
1/2
- D.
4/5
Attempted by 37 students.
Show answer & explanation
Correct answer: C
Answer: 1/2
Reason:
A fair coin has probability 1/2 for head and 1/2 for tail on any single toss. Coin tosses are independent events, so the outcomes of the first four tosses do not change the probability for the fifth toss.
Independence: previous results do not affect future tosses.
Therefore: P(tail on 5th toss) = 1/2.