{"id":17944,"date":"2024-04-21T22:51:04","date_gmt":"2024-04-21T22:51:04","guid":{"rendered":"https:\/\/soicau5037.minhngocxoso.com\/?p=17944"},"modified":"2024-04-21T22:51:04","modified_gmt":"2024-04-21T22:51:04","slug":"cach-tinh-xac-suat-lo-de-chinh-xac-cho-anh-em-tan-thu","status":"publish","type":"post","link":"https:\/\/soicaulode68.com\/cach-tinh-xac-suat-lo-de-chinh-xac-cho-anh-em-tan-thu\/","title":{"rendered":"c\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 ch\u00ednh x\u00e1c cho anh em t\u00e2n th\u1ee7"},"content":{"rendered":"\n
C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 s\u1ebd gi\u00fap anh em t\u0103ng t\u1ef7 l\u1ec7 th\u1eafng l\u00f4, n\u1ebfu \u00e1p d\u1ee5ng \u0111\u00fang th\u00ec c\u00f3 th\u1ec3 v\u1ec1 b\u1edd th\u01b0\u1eddng xuy\u00ean. Chi ti\u1ebft c\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 hi\u1ec7u qu\u1ea3 cho c\u00e1c anh em m\u1edbi ch\u01a1i.<\/p>\n\n\n\n
D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00f4ng th\u1ee9c t\u00ednh c\u1ee5 th\u1ec3 nh\u1ea5t, m\u1eddi m\u1ecdi ng\u01b0\u1eddi c\u00f9ng tham kh\u1ea3o.<\/p>\n\n\n\n
C\u00f4ng th\u1ee9c \u0103n \u0111\u01b0\u1ee3c con l\u00f4 s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau: [1 \u2013 [(100 \u2013 n)% m\u0169 27)] x 10 (v\u1edbi n l\u00e0 s\u1ed1 l\u01b0\u1ee3ng con s\u1ed1 \u0111\u01b0\u1ee3c \u0111\u1ea7u t\u01b0).<\/p>\n\n\n\n
V\u1eady % \u0103n \u0111\u01b0\u1ee3c n\u1ebfu \u0111\u00e1nh 1 con l\u00f4: [1 \u2013 [(100 \u2013 1)% m\u0169 27)] x 10 = 23,7%.<\/p>\n\n\n\n
T\u01b0\u01a1ng t\u1ef1 c\u00f4ng th\u1ee9c tr\u00ean ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng suy ra \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n
\u0110\u00e2y l\u00e0 c\u00e1ch t\u00ednh \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u00e0i x\u1ed5 s\u1ed1 Mi\u1ec1n B\u1eafc (27 gi\u1ea3i), \u0111\u1ed1i v\u1edbi XSMN v\u00e0 XSMT k\u1ebft qu\u1ea3 n\u00e0y s\u1ebd c\u00f3 ch\u00fat thay \u0111\u1ed5i v\u00ec b\u1ea3ng KQXS m\u1ed7i ng\u00e0y ch\u1ec9 c\u00f3 18 gi\u1ea3i, m\u1ecdi ng\u01b0\u1eddi ch\u1ec9 c\u1ea7n thay \u0111\u1ed5i con s\u1ed1 v\u00e0 \u00e1p d\u1ee5ng theo c\u00f4ng th\u1ee9c tr\u00ean l\u00e0 \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n
Kh\u00f4ng ph\u1ee9c t\u1ea1p nh\u01b0 c\u00e1ch ch\u01a1i l\u00f4, c\u00e1ch t\u00ednh t\u1ec9 l\u1ec7 tr\u00fang con \u0111\u1ec1 c\u00f3 ph\u1ea7n \u0111\u01a1n gi\u1ea3n h\u01a1n \u0111\u00f4i ch\u00fat. \u0110\u1ed1i v\u1edbi c\u1ea3 3 Mi\u1ec1n B\u1eafc \u2013 Trung \u2013 Nam th\u00ec ch\u1ec9 c\u1ea7n b\u1ea1n \u0111o\u00e1n tr\u00fang \u0111\u01b0\u1ee3c 1 trong 100 con s\u1ed1 t\u1eeb 00 \u2013 99 c\u1ee7a 2 s\u1ed1 cu\u1ed1i c\u1ee7a gi\u1ea3i \u0111\u1eb7c bi\u1ec7t l\u00e0 d\u00e0nh \u0111\u01b0\u1ee3c chi\u1ebfn th\u1eafng. T\u1eeb \u0111\u00e2y, ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng suy ra \u0111\u01b0\u1ee3c % \u0103n \u0111\u01b0\u1ee3c con \u0111\u1ec1 s\u1ebd l\u00e0 1%. C\u1ee5 th\u1ec3:<\/p>\n\n\n\n
L\u00f4 xi\u00ean 2 l\u00e0 c\u00e1ch ch\u01a1i m\u00e0 b\u1ea1n c\u1ea7n ph\u1ea3i d\u1ef1 \u0111o\u00e1n tr\u00fang \u0111\u01b0\u1ee3c c\u1ea3 2 con l\u00f4 t\u00f4 s\u1ebd v\u1ec1 trong c\u00f9ng m\u1ed9t k\u1ef3 quay th\u01b0\u1edfng, v\u00ec th\u1ebf ta s\u1ebd c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n
=> % \u0103n \u0111\u01b0\u1ee3c xi\u00ean 2 s\u1ebd l\u00e0: 100% \u2013 94,1% = 5,8%.<\/p>\n\n\n\n
L\u00f4 xi\u00ean 3 l\u00e0 c\u00e1ch ch\u01a1i m\u00e0 b\u1ea1n c\u1ea7n d\u1ef1 \u0111o\u00e1n tr\u00fang \u0111\u01b0\u1ee3c c\u1ea3 3 con loto s\u1ebd v\u1ec1 trong c\u00f9ng m\u1ed9t k\u1ef3 m\u1edf th\u01b0\u1edfng v\u1edbi % tr\u00fang chi ti\u1ebft \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n
T\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1ch t\u00ednh c\u1ee7a l\u00f4 xi\u00ean 2, ch\u00fang ta s\u1ebd t\u00ednh \u0111\u01b0\u1ee3c t\u1ec9 l\u1ec7 thua xi\u00ean 3 s\u1ebd l\u00e0: % tr\u01b0\u1ee3t c\u1ea3 3 + % \u0103n 2 con + % \u0103n 1 con = 98,5%.<\/p>\n\n\n\n
V\u1eady % \u0103n \u0111\u01b0\u1ee3c con xi\u00ean 3 s\u1ebd b\u1eb1ng: 100% \u2013 98,5% = 1,5%.<\/p>\n\n\n\n