Gi\u1edbi thi\u1ec7u h\u00ecnh th\u1ee9c ch\u01a1i l\u00f4 xi\u00ean 3<\/figcaption><\/figure>\n\u0110\u00e2y l\u00e0 m\u1ed9t th\u1eed th\u00e1ch kh\u00f4ng h\u1ec1 nh\u1ecf \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi ch\u01a1i. Anh em ph\u1ea3i c\u00f3 ki\u1ebfn th\u1ee9c, k\u1ef9 n\u0103ng v\u00e0 bi\u1ebft c\u00e1ch v\u1eadn d\u1ee5ng chi\u1ebfn l\u01b0\u1ee3c kh\u00f4n ngoan th\u00ec m\u1edbi c\u00f3 c\u01a1 h\u1ed9i chi\u1ebfn th\u1eafng. Theo \u0111\u00e1nh gi\u00e1, x\u00e1c su\u1ea5t chinh ph\u1ee5c <\/span>l\u00f4 xi\u00ean 3 <\/b>th\u00e0nh c\u00f4ng kh\u00f4ng qu\u00e1 cao n\u00ean ph\u1ea7n th\u01b0\u1edfng th\u01b0\u1eddng r\u1ea5t l\u1edbn. Tuy nhi\u00ean, n\u00f3 v\u1eabn thu h\u00fat \u0111\u01b0\u1ee3c nhi\u1ec1u cao th\u1ee7 chinh ph\u1ee5c v\u1edbi mong mu\u1ed1n l\u00e0m gi\u00e0u ch\u1ec9 sau m\u1ed9t \u0111\u00eam.\u00a0<\/span><\/p>\n<\/span>T\u00ecm hi\u1ec3u t\u1ef7 l\u1ec7 tr\u00fang th\u01b0\u1edfng khi ch\u01a1i l\u00f4 xi\u00ean 3<\/b><\/span><\/h2>\nN\u1ebfu anh em mu\u1ed1n n\u1eafm ch\u00ednh x\u00e1c kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng l\u00f4 x\u00e2u 3 th\u00ec c\u1ea7n ph\u1ea3i t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c x\u00e1c su\u1ea5t tr\u00fang m\u1ed9t con l\u00f4 l\u00e0 bao nhi\u00eau. \u0110\u1ed1i v\u1edbi x\u1ed5 s\u1ed1 ki\u1ebfn thi\u1ebft mi\u1ec1n B\u1eafc, m\u1ed7i k\u1ef3 quay th\u01b0\u1edfng th\u01b0\u1eddng c\u00f3 27 con s\u1ed1 b\u1ea5t k\u1ef3 tr\u00fang th\u01b0\u1edfng (n\u1eb1m trong d\u00e3y t\u1eeb 00 \u0111\u1ebfn 99). T\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 suy ra:<\/span><\/p>\n\n- T\u1ef7 l\u1ec7 th\u1eafng tuy\u1ec7t \u0111\u1ed1i cho 27 con l\u00f4: \u0111\u00e1nh c\u1ea3 100 con t\u1eeb 00 – 99<\/span><\/li>\n
- T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t n\u1ebfu ch\u1ec9 \u0111\u00e1nh 1 con l\u00f4 l\u00e0 99%<\/span><\/li>\n<\/ul>\n
C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/span><\/p>\n\n- T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 1 l\u00f4: 99%<\/span><\/li>\n
- T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 2 l\u00f4: 99%*99%<\/span><\/li>\n
- T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 3 l\u00f4: 99%*99%*99%<\/span><\/li>\n
- T\u1ef7 l\u1ec7 tr\u00fang 1 l\u00f4\u00a0 = [1 – (99%27)]*100 = 23.7%<\/span><\/li>\n
- T\u1ef7 l\u1ec7 tr\u00fang n l\u00f4 = [1 – {(100-n)%27}]*100<\/span><\/li>\n<\/ul>\n
D\u1ef1a v\u00e0o d\u1eef li\u1ec7u tr\u00ean, anh em c\u00f3 th\u1ec3 t\u1ed1i gi\u1ea3n h\u00f3a c\u00f4ng th\u1ee9c t\u00ednh x\u00e1c su\u1ea5t th\u1eafng l\u00f4. C\u1ee5 th\u1ec3 l\u00e0:<\/span><\/p>\n\n- X\u00e1c su\u1ea5t tr\u00fang 1 l\u00f4: 23.7%<\/span><\/li>\n
- X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 1 l\u00f4: 99%<\/span><\/li>\n
- X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 2 l\u00f4: 99%2 ~ 98%<\/span><\/li>\n
- X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 3 l\u00f4: 99%3 ~ 97%<\/span><\/li>\n<\/ul>\n