Poorly stated question, as it is ambiguous as to whether it is asking for the number of red balls that have been observed or the number that remain in the urn. Oh, "discarded" is spelled with a d. That much I can fix.
Agree with John D'Errico that the Problem Statement is ambiguous. For the record, based on case 5 of the Test Suite, it must be the _observed_ number of red balls that is to be computed.
Fahrenheit to Celsius converter
Add two numbers
03 - Matrix Variables 5
poll: would you like the regexp (?@cmd) functionality to be banned in Cody?
Area of polygon
Probabilities - More brains than luck
Performance - summation
Geometrical meaning of determinant
Non trivial identities - summation
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