For example, chance is 100% for minimum 0 heads when a coin is tossed 7 times.
Chance is 50% for minimum 2 heads when a coin is tossed 3 times.
Chance is 0% for minimum 12 heads when a coin is tossed 11 times.
this problem could use some nontrivial testcases
Distance walked 1D
Return elements unique to either input
Add two numbers
letter yes yes & letter no no
cos for boss?
Sorted highest to lowest?
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