Difference between revisions of "Complementary counting"
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| − | '''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". | + | '''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". |
Revision as of 11:04, 23 July 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
Introductory
