{"id":682,"date":"2026-05-05T04:59:01","date_gmt":"2026-05-05T04:59:01","guid":{"rendered":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/30-cau-xac-suat-co-dieu-kien-tong-hop-de-thi-truong-so-anh-giao-kid\/"},"modified":"2026-05-05T07:33:43","modified_gmt":"2026-05-05T07:33:43","slug":"30-cau-xac-suat-co-dieu-kien-tong-hop-de-thi-truong-so-anh-giao-kid","status":"publish","type":"post","link":"https:\/\/79.buffdemo.com\/index.php\/2026\/05\/05\/30-cau-xac-suat-co-dieu-kien-tong-hop-de-thi-truong-so-anh-giao-kid\/","title":{"rendered":"30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid"},"content":{"rendered":"<p><a href=\"https:\/\/tailieuonthi.edu.vn\/30-cau-xac-suat-co-dieu-kien-tong-hop-de-thi-truong-so-anh-giao-kid\/\" target=\"_blank\" rel=\"noopener\">30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid<\/a> t\u1ed5ng h\u1ee3p c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n th\u01b0\u1eddng g\u1eb7p trong c\u00e1c \u0111\u1ec1 thi c\u1ee7a tr\u01b0\u1eddng v\u00e0 s\u1edf. T\u00e0i li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac r\u00f5 r\u00e0ng, m\u1ed7i c\u00e2u h\u1ecfi \u0111\u1ec1u \u0111i k\u00e8m \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i chi ti\u1ebft gi\u00fap h\u1ecdc sinh n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c, r\u00e8n luy\u1ec7n k\u1ef9 n\u0103ng gi\u1ea3i b\u00e0i t\u1eadp v\u00e0 t\u1ef1 tin chinh ph\u1ee5c c\u00e1c k\u1ef3 thi quan tr\u1ecdng. \u0110\u1eebng b\u1ecf l\u1ee1, c\u00f9ng <a href=\"https:\/\/tailieuonthi.edu.vn\/\" rel=\"noopener\" target=\"_blank\">T\u00e0i Li\u1ec7u \u00d4n Thi<\/a> t\u00ecm hi\u1ec3u chi ti\u1ebft \u0111\u1ec3 t\u1ef1 tin chinh ph\u1ee5c \u0111i\u1ec3m cao nh\u00e9!<\/p>\n<h2>N\u1ed9i dung 30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid<\/h2>\n<p>30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid bao g\u1ed3m 30 c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m v\u00e0 t\u1ef1 lu\u1eadn v\u1ec1 x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n, \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp \u0111a d\u1ea1ng, t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi tham kh\u1ea3o n\u1eb1m trong b\u1ed9 t\u00e0i li\u1ec7u:<\/p>\n<p>C\u00c2U 1: T\u1ea1i m\u1ed9t tr\u01b0\u1eddng THPT c\u00f3 $30\\%$ h\u1ecdc sinh tham gia c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao. Trong s\u1ed1 nh\u1eefng h\u1ecdc sinh n\u00e0y, c\u00f3 $70\\%$ bi\u1ebft b\u01a1i. Ngo\u00e0i ra, c\u00f3 $20\\%$ s\u1ed1 h\u1ecdc sinh kh\u00f4ng tham gia c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao c\u0169ng bi\u1ebft b\u01a1i. Ch\u1ecdn ng\u1eabu nhi\u00ean m\u1ed9t h\u1ecdc sinh c\u1ee7a tr\u01b0\u1eddng. X\u00e9t c\u00e1c bi\u1ebfn c\u1ed1: $A$: \u201cCh\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh thu\u1ed9c c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao\u201d; $B$: \u201cCh\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh bi\u1ebft b\u01a1i\u201d.<\/p>\n<ul>\n<li>a) X\u00e1c su\u1ea5t ch\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh thu\u1ed9c c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao l\u00e0 $P(A) = 0,3$.<\/li>\n<li>b) X\u00e1c su\u1ea5t ch\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh bi\u1ebft b\u01a1i, bi\u1ebft h\u1ecdc sinh \u0111\u00f3 kh\u00f4ng thu\u1ed9c c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao, l\u00e0 $P(B|\\overline{A}) = 0,2$.<\/li>\n<li>c) X\u00e1c su\u1ea5t ch\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh bi\u1ebft b\u01a1i l\u00e0 $P(B) = 0,21$.<\/li>\n<li>d) Gi\u1ea3 s\u1eed ch\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh bi\u1ebft b\u01a1i. X\u00e1c su\u1ea5t ch\u1ecdn \u0111\u01b0\u1ee3c h\u1ecdc sinh thu\u1ed9c c\u00e2u l\u1ea1c b\u1ed9 th\u1ec3 thao l\u00e0 $P(A|B) = 0,6$.<\/li>\n<\/ul>\n<p>\u0110\u00e1p \u00e1n: \u0110\u00fang \u2013 \u0110\u00fang \u2013 Sai \u2013 \u0110\u00fang<\/p>\n<p>L\u1eddi gi\u1ea3i<\/p>\n<p><img loading=\"lazy\" alt=\"\" class=\"aligncenter\" decoding=\"async\" height=\"241\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/06\/30-cau-xac-suat-co-dieu-kien-tong-hop-de-thi-truong-so-anh-giao-kid-1.jpg\" width=\"418\"\/><\/p>\n<ul>\n<li>a) $P(A)=0,3$<\/li>\n<li>b) $P(B|\\overline{A})=\\frac{P(B\\overline{A})}{P(\\overline{A})} = \\frac{0,7 \\cdot 0,2}{0,7} = 0,2$<\/li>\n<li>c) $P(B)=P(A) \\cdot P(B|A) + P(\\overline{A}) \\cdot P(B|\\overline{A}) = 0,3 \\cdot 0,7 + 0,7 \\cdot 0,2 = 0,35$<\/li>\n<li>d) $P(A|B)=\\frac{P(AB)}{P(B)} = \\frac{0,3 \\cdot 0,7}{0,35} = 0,6$<\/li>\n<\/ul>\n<h2>T\u1ea3i 30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid<\/h2>\n<p>\u0110\u1ec3 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u00e0 t\u1ef1 tin chinh ph\u1ee5c c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n trong c\u00e1c k\u1ef3 thi s\u1eafp t\u1edbi, h\u00e3y t\u1ea3i ngay <a href=\"https:\/\/tailieuonthi.edu.vn\/lop-12\/toan-12\/\" rel=\"noopener\" target=\"_blank\">t\u00e0i li\u1ec7u to\u00e1n 12<\/a>\u00a030 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid \u0111\u1ec3 luy\u1ec7n t\u1eadp hi\u1ec7u qu\u1ea3.<\/p>\n<p><img loading=\"lazy\" alt=\"\" decoding=\"async\" height=\"1755\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/06\/30-CAU-XAC-SUAT-CO-DIEU-KIEN_page-0001.jpg\" width=\"1241\"\/><\/p>\n<p><img alt=\"\" decoding=\"async\" height=\"1755\" loading=\"lazy\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/06\/30-CAU-XAC-SUAT-CO-DIEU-KIEN_page-0002.jpg\" width=\"1241\"\/><\/p>\n<p><img alt=\"\" decoding=\"async\" height=\"1755\" loading=\"lazy\" src=\"https:\/\/tailieuonthi.edu.vn\/wp-content\/uploads\/2025\/06\/30-CAU-XAC-SUAT-CO-DIEU-KIEN_page-0003.jpg\" width=\"1241\"\/><\/p>\n<p><a class=\"custom-button\" href=\"https:\/\/drive.google.com\/file\/d\/19asIjcPil9euhG0COxgV26hZRh94ZF8D\/\/view\" rel=\"nofollow noopener\" target=\"_blank\">T\u1ea3i 30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>30 c\u00e2u x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p \u0111\u1ec1 thi tr\u01b0\u1eddng s\u1edf Anh Gi\u00e1o Kid t\u1ed5ng h\u1ee3p c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp x\u00e1c su\u1ea5t c\u00f3 \u0111i\u1ec1u ki\u1ec7n th\u01b0\u1eddng g\u1eb7p trong c\u00e1c \u0111\u1ec1 thi c\u1ee7a tr\u01b0\u1eddng v\u00e0 s\u1edf. T\u00e0i li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac r\u00f5 r\u00e0ng, m\u1ed7i c\u00e2u h\u1ecfi \u0111\u1ec1u \u0111i k\u00e8m \u0111\u00e1p \u00e1n v\u00e0 l\u1eddi gi\u1ea3i [&#8230;]\n","protected":false},"author":1,"featured_media":1880,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[78,10],"class_list":["post-682","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-toan-12","tag-anh-giao-kid","tag-toan-12"],"_links":{"self":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/comments?post=682"}],"version-history":[{"count":1,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/682\/revisions"}],"predecessor-version":[{"id":1881,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/posts\/682\/revisions\/1881"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media\/1880"}],"wp:attachment":[{"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/media?parent=682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/categories?post=682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/79.buffdemo.com\/index.php\/wp-json\/wp\/v2\/tags?post=682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}