Timeline for A fair coin is tossed $n$ times by two people. What is the probability that they get same number of heads?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Mar 18, 2021 at 8:52 | comment | added | Henry | @user71207 You can say ${n \choose k}(\frac{1}{2})^k (\frac{1}{2})^{n-k} = {n \choose n-k}(\frac{1}{2})^{n-k} (\frac{1}{2})^{k}$ | |
| Mar 18, 2021 at 6:36 | comment | added | user71207 | Can you explain your first line? $(\frac{1}{2})^k ≠ (\frac{1}{2})^{n-k}$ | |
| Nov 18, 2011 at 22:02 | vote | accept | problab | ||
| Nov 18, 2011 at 21:58 | history | answered | Henry | CC BY-SA 3.0 |