A pair of physicists toss a coin n times each.
What is the probability that they tossed the same number of heads?
Input: N % number of tosses
Output: P
Examples:
N=1 P=0.5;
N=2 P=0.375
Test Suite will round to 6 places
Solution Stats
Solution Comments
Problem Recent Solvers27
Suggested Problems
-
336 Solvers
-
Back to basics 8 - Matrix Diagonals
707 Solvers
-
Back to basics 16 - byte order
148 Solvers
-
630 Solvers
-
392 Solvers
More from this Author236
Problem Tags
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)
Solution 184390
This fails for test case 4 even though it is mathematically correct--it gives 0.27343749999999994 instead of 0.2734375, while the test suite asks for 0.273438; it seems as though a fair test generally has to be of the form abs(y-y_correct)<tol*abs(y_correct); rounding to some number of decimal places always allows for possibilities like this. (Not a complaint, just a point of interest.)