If a fair coin is tossed four times. What is the probability that two heads…
2004
If a fair coin is tossed four times. What is the probability that two heads and two tails will result?
- A.
3/8
- B.
1/2
- C.
5/8
- D.
2/4
Attempted by 11 students.
Show answer & explanation
Correct answer: A
There are 2^4 = 16 equally likely outcomes when a fair coin is tossed four times. To get exactly two heads and two tails, choose the 2 positions occupied by heads: C(4,2) = 6. Therefore, the required probability is 6/16 = 3/8.