Union

strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
strict warning: Declaration of views_plugin_style_default::options() should be compatible with views_object::options() in /home/iamin/www/umdb/biostats/sites/default/modules/views/plugins/views_plugin_style_default.inc on line 0.
strict warning: Declaration of views_plugin_row::options_validate() should be compatible with views_plugin::options_validate(&$form, &$form_state) in /home/iamin/www/umdb/biostats/sites/default/modules/views/plugins/views_plugin_row.inc on line 0.
strict warning: Declaration of views_plugin_row::options_submit() should be compatible with views_plugin::options_submit(&$form, &$form_state) in /home/iamin/www/umdb/biostats/sites/default/modules/views/plugins/views_plugin_row.inc on line 0.
strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/iamin/www/umdb/biostats/sites/default/modules/views/handlers/views_handler_filter.inc on line 0.
strict warning: Declaration of views_handler_filter::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home/iamin/www/umdb/biostats/sites/default/modules/views/handlers/views_handler_filter.inc on line 0.
strict warning: Declaration of views_handler_filter_boolean_operator::value_validate() should be compatible with views_handler_filter::value_validate($form, &$form_state) in /home/iamin/www/umdb/biostats/sites/default/modules/views/handlers/views_handler_filter_boolean_operator.inc on line 0.
strict warning: Declaration of views_handler_argument::init() should be compatible with views_handler::init(&$view, $options) in /home/iamin/www/umdb/biostats/sites/default/modules/views/handlers/views_handler_argument.inc on line 0.
strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.

Le fait que deux événements peuvent se réaliser simultanément sur un même individu (intersection) ou seulement un seul (ou aucun) sur un individu s'appelle l'union de deux évènements. Ainsi, une drosophile qui possède des ailes normales (A) ou des yeux rouges (B) est symbolisée de la manière suivante: TeX Embedding failed!

Dans le diagramme de Venn, cette probabilité se représente comme suit: