Art of Problem Solving

Complementary counting: Difference between revisions

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'''Complementary counting''' is counting what we don't want, and substracting that from the total number of possibilities.
'''Complementary counting''' is counting what we don't want, and substracting that from the total number of possibilities. A big hint that complementary counting may lead to a quick solution is the phrase "at least".


== Examples ==
== Examples ==

Revision as of 10:32, 19 June 2006

Complementary counting is counting what we don't want, and substracting that from the total number of possibilities. A big hint that complementary counting may lead to a quick solution is the phrase "at least".

Examples

See also