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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?

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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?

Darkside  Sep 2, 2018
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We have 10C$$* (\frac{1}{2})^2 ≈ 0.044$$

- Daisy

dierdurst  Sep 2, 2018
edited by dierdurst  Sep 2, 2018
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It is: 10C8 x (1/2)^10 =~0.0439.........etc.

Guest Sep 3, 2018
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{10! / [8! * 2!]} / 2^10 =45 / 1,024 =0.0439453125.

OR: 10C2 / 2^10 =45 / 1,024            =0.0439453125.

Guest Sep 2, 2018
edited by Guest  Sep 2, 2018