Two heads given an even count
Three fair coins are flipped. Given that the number of heads is even, what is the probability that exactly two of them are heads? Give a decimal to four places.
Show hints (2)+
- Even head counts are 0 and 2 - don't forget 0 is even.
- Exactly-2 outcomes among all even-count outcomes: of .
Answer
Reveal answer →Final answer
0.75 (± 0.001)
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