1980 Canadian MO Problems/Problem 4
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Problem
A gambling student tosses a fair coin. She gains point for each head that turns up, and gains
points for each tail that turns up. Prove that the probability of the student scoring [i]exactly[/i]
points is
.
Solution
See Also
1980 Canadian MO (Problems) | ||
Preceded by First Question |
1 • 2 • 3 • 4 • 5 | Followed by Problem 3 |