You have a coin that is either fair or biased. If you flip it 5 times and it lands heads 5 times, what is the probability it’s fair?
Category: Brain · Difficulty: hard
Hint: Think about the likelihood of repeated outcomes.
Answer
1/32
Explanation
For a fair coin, the probability of getting 5 heads in a row is (1/2)^5 = 1/32.
This is a hard brain riddle — a tricky one that takes a little thought. The answer is 1/32.
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