{"id":8545,"date":"2023-09-20T12:09:00","date_gmt":"2023-09-20T11:09:00","guid":{"rendered":"https:\/\/exos.education\/fr\/exercice-mathematiques-probabilites-niveau-troisieme-dysorthographiques\/"},"modified":"2023-08-21T14:54:30","modified_gmt":"2023-08-21T13:54:30","slug":"exercice-mathematiques-probabilites-niveau-troisieme-dysorthographiques","status":"publish","type":"post","link":"https:\/\/exos.education\/fr\/exercice-mathematiques-probabilites-niveau-troisieme-dysorthographiques\/","title":{"rendered":"Exercice Math\u00e9matiques Probabilit\u00e9s Niveau Troisi\u00e8me Dysorthographiques."},"content":{"rendered":"

Points importants du cours : <\/p>\n

Les probabilit\u00e9s permettent de mesurer le hasard. La probabilit\u00e9 d’un \u00e9v\u00e9nement, not\u00e9e P(E), est un nombre compris entre 0 et 1. Quand l’\u00e9v\u00e9nement est impossible, sa probabilit\u00e9 est \u00e9gale \u00e0 0. S’il est certain, sa probabilit\u00e9 est \u00e9gale \u00e0 1. Pour tous les \u00e9v\u00e8nements possibles, la somme de leurs probabilit\u00e9s vaut 1.<\/p>\n

Consignes pour l’exercice :<\/p>\n

\" Vous vous retrouvez dans une classe compos\u00e9e de 25 \u00e9l\u00e8ves dont : <\/p>\n

– \"11 gar\u00e7ons
– \"14 filles<\/p>\n

Voici des s\u00e9lections al\u00e9atoires que vous pouvez faire :<\/p>\n

A = Piocher un gar\u00e7on
B = Piocher une fille<\/p>\n

Quelle serait donc la chance (probabilit\u00e9) de piocher :<\/p>\n

\"1\ufe0f\u20e3\" Un gar\u00e7on ? (2 points)<\/p>\n

\"2\ufe0f\u20e3\" Une fille ?(2 points) <\/p>\n

\"3\ufe0f\u20e3\" Non seulement une fille mais aussi un gar\u00e7on en deux tentatives ? (4 points)<\/p>\n

Notez bien vos r\u00e9ponses sous forme de fraction ou nombre d\u00e9cimal.<\/p>\n

R\u00e9ponses aux questions :<\/p>\n

\"1\ufe0f\u20e3\" P(A) = Nombre total des cas favorables \/ nombre total des cas possibles => la chance de tirer un gar\u00e7on =<\/p>\n

11 \/ 25.<\/p>\n

\"2\ufe0f\u20e3\" De m\u00eame pour B => la chance de tirer une fille =
14 \/25 .<\/p>\n

\"3\ufe0f\u20e3\" Pour ce qui est du troisi\u00e8me cas C=p(A puis B)=P(A)*P(B apr\u00e8s A))
c’est \u00e0 dire piocher d’abord un \u00e9l\u00e8ve quelconque soit A puis enlever cet \u00e9l\u00e8ve du groupe restant et calculer la nouvelle chance d’avoir le second soit B :
(11\/25 ) * (14\/24 ) ici on a retir\u00e9 le premier \u00e9l\u00e8ve gagnant donc il reste plus que 24.<\/p>\n

Cet exercice \u00e9tant con\u00e7u sp\u00e9cifiquement pour les \u00e9l\u00e8ves dysorthographiques nul besoin d’une \u00e9criture parfaite pour comprendre et r\u00e9ussir l’exercice car il suffit juste d’identifier correctement chaque situation et faire les calculs n\u00e9cessaires.<\/p>\n","protected":false},"excerpt":{"rendered":"

Points importants du cours : Les probabilit\u00e9s permettent de mesurer le hasard. La probabilit\u00e9 d’un \u00e9v\u00e9nement, not\u00e9e P(E), est un nombre compris entre 0 et 1. Quand l’\u00e9v\u00e9nement est impossible, sa probabilit\u00e9 est \u00e9gale \u00e0 0. S’il est certain, sa probabilit\u00e9 est \u00e9gale \u00e0 1. Pour tous les \u00e9v\u00e8nements possibles, la somme de leurs probabilit\u00e9s […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[7,26,6,5,4,53,1],"tags":[],"class_list":["post-8545","post","type-post","status-publish","format-standard","hentry","category-mathematiques","category-dysorthographiques","category-accessibilite","category-niveaux","category-matieres","category-3eme","category-exercices-pedagogiques-imprimables-et-gratuits"],"_links":{"self":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/comments?post=8545"}],"version-history":[{"count":0,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8545\/revisions"}],"wp:attachment":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/media?parent=8545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/categories?post=8545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/tags?post=8545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}