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We flip a fair coin 10 times. What is the probability that we get heads in exactly 8 of the 10 flips?

rohitaop  Jun 13, 2018
 #1
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((8 + 2)!)/(8! 2! 2^(8 + 2)) = 45/1024 ≈ 0.04395 =4.395% probability of exactly 8 heads.

Guest Jun 13, 2018
 #2
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nCr(10,8)*0.5^10 = 0.0439453125

Melody  Jun 14, 2018

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