A coin is tossed live times. What is the probability that there is at the least one tail?
Correct answer: A. 31/32
- A. 31/32
- B. 1/16
- C. 1/2
- D. 1/32
Explanation
For five fair tosses, the complement of at least one tail is getting no tails, meaning five heads, with probability (1/2)^5 = 1/32. Therefore, P(at least one tail) = 1 - 1/32 = 31/32. The likely mistake is choosing 1/32, which is the probability of five heads, not the probability of at least one tail.
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