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".