# inclusion-exclusion principle

(redirected from*Principle of inclusion-exclusion*)

## inclusion-exclusion principle

[¦in‚klü·zhən ′eks‚klü·zhən ‚prin·sə·pəl] (mathematics)

The principle that, if

*A*and*B*are finite sets, the number of elements in the union of*A*and*B*can be obtained by adding the number of elements in*A*to the number of elements in*B*, and then subtracting from this sum the number of elements in the intersection of*A*and*B*.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

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