<\/p>\n<\/div>\n
<\/p>\n
Ngo\u00e0i x\u1ed5 s\u1ed1 ki\u1ebfn thi\u1ebft truy\u1ec1n th\u1ed1ng th\u00ec \u0111\u00e1nh l\u00f4 d\u1ef1a theo k\u1ebft qu\u1ea3 x\u1ed1 s\u1ed1 \u0111\u00e3 tr\u1edf n\u00ean kh\u00e1 quen thu\u1ed9c v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi. \u0110i\u1ec3m \u0111\u1eb7c bi\u1ec7t c\u1ee7a l\u00f4 h\u01a1n h\u1eb3n so v\u1edbi \u0111\u1ec1 l\u00e0 c\u00f3 nhi\u1ec1u gi\u1ea3i, d\u1ec5 \u0111\u00e1nh, t\u1ec9 l\u1ec7 tr\u00fang cao h\u01a1n, h\u01a1n n\u1eefa v\u1edbi nh\u1eefng con l\u00f4 v\u1ec1 hai nh\u00e1y, ba nh\u00e1y, ng\u01b0\u1eddi ch\u01a1i l\u1ea1i c\u00e0ng nh\u00e2n l\u00ean \u0111\u01b0\u1ee3c ti\u1ec1n th\u01b0\u1edfng. Ch\u00ednh v\u00ec v\u1eady, ch\u01a1i l\u00f4 xi\u00ean \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi th\u00edch v\u00e0 tham gia ch\u01a1i. V\u1eady b\u1ea1n \u0111\u00e3 hi\u1ec3u c\u00e1ch ch\u01a1i l\u00f4 xi\u00ean<\/strong><\/span> nh\u01b0 th\u1ebf n\u00e0o v\u00e0 c\u00f3 ph\u01b0\u01a1ng ph\u00e1p g\u00ec \u0111\u1ec3 \u0111\u00e1nh t\u0103ng t\u1ec9 l\u1ec7 tr\u00fang ch\u01b0a? H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u qua b\u00e0i vi\u1ebft sau. Tr\u01b0\u1edbc h\u1ebft, \u0111\u1ec3 hi\u1ec3u l\u00f4 xi\u00ean l\u00e0 g\u00ec, c\u00e1c b\u1ea1n c\u1ea7n ph\u1ea3i hi\u1ec3u s\u1ed1 l\u00f4 \u0111\u1ec1 l\u00e0 g\u00ec? L\u00e0 m\u1ed9t s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 t\u1eeb 00 \u0111\u1ebfn 99, n\u1eb1m ph\u00eda cu\u1ed1i c\u00f9ng c\u1ee7a c\u00e1c l\u00f4 gi\u1ea3i. T\u1ea1i \u0111\u00e0i x\u1ed5 s\u1ed1 H\u00e0 N\u1ed9i c\u00f3 27 l\u00f4 gi\u1ea3i, t\u1ea1i c\u00e1c \u0111\u00e0i mi\u1ec1n Nam c\u00f3 18 l\u00f4 gi\u1ea3i.<\/p>\n L\u00f4 xi\u00ean, hay c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 l\u00f4 x\u00e2u: L\u00e0 m\u1ed9t xi\u00ean ho\u1eb7c m\u1ed9t x\u00e2u k\u1ebft h\u1ee3p t\u1eeb 2, 3 ho\u1eb7c 4 s\u1ed1 l\u00f4. B\u1ea1n \u0111\u00e1nh s\u1ed1 l\u00f4 xi\u00ean 2, ngh\u0129a l\u00e0 b\u1ea1n c\u01b0\u1ee3c c\u00f9ng m\u1ed9t l\u00fac k\u1ebft qu\u1ea3 s\u1ebd xu\u1ea5t hi\u1ec7n c\u1ea3 2 s\u1ed1 b\u1ea1n c\u01b0\u1ee3c.<\/p>\n Ch\u1ecdn 2 s\u1ed1 l\u00f4, m\u1ed7i s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 t\u1eeb 00 \u0111\u1ebfn 99<\/p>\n C\u00e1c d\u00f2 th\u1eafng l\u00f4 xi\u00ean 2: d\u1ef1a v\u00e0o 2 ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i th\u01b0\u1edfng (27 l\u00f4 gi\u1ea3i c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i, 18 l\u00f4 gi\u1ea3i c\u1ee7a c\u00e1c \u0111\u00e0i Mi\u1ec1n Trung v\u00e0 Mi\u1ec1n Nam).<\/p>\n C\u1ea3 2 s\u1ed1 l\u00f4 n\u00e0y ph\u1ea3i tr\u00f9ng v\u1edbi s\u1ed1 l\u00f4 b\u1ea1n ch\u1ecdn.<\/p>\n V\u00ed d\u1ee5: l\u00f4 xi\u00ean 2: 25 \u2013 32 c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i. Hay l\u00f4 xi\u00ean 2: 45 \u2013 56 c\u1ee7a \u0111\u00e0i mi\u1ec1n Nam<\/p>\n Ch\u1ecdn 3 s\u1ed1 l\u00f4, m\u1ed7i s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 t\u1eeb 00 \u0111\u1ebfn 99<\/p>\n C\u00e1c d\u00f2 th\u1eafng l\u00f4 xi\u00ean 3: d\u1ef1a v\u00e0o 2 ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i th\u01b0\u1edfng (27 l\u00f4 gi\u1ea3i c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i, 18 l\u00f4 gi\u1ea3i c\u1ee7a c\u00e1c \u0111\u00e0i Mi\u1ec1n Trung v\u00e0 Mi\u1ec1n Nam).<\/p>\n C\u1ea3 3 s\u1ed1 l\u00f4 n\u00e0y ph\u1ea3i tr\u00f9ng v\u1edbi s\u1ed1 l\u00f4 b\u1ea1n ch\u1ecdn.<\/p>\n V\u00ed d\u1ee5: l\u00f4 xi\u00ean 3: 24 \u2013 62 \u2013 05 c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i. Hay l\u00f4 xi\u00ean 3: 45 \u2013 58 \u2013 27 c\u1ee7a \u0111\u00e0i ni\u1ec1m Nam<\/p>\n Ch\u1ecdn 4 s\u1ed1 l\u00f4, m\u1ed7i s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 t\u1eeb 00 \u0111\u1ebfn 99<\/p>\n <\/p>\n C\u00e1c d\u00f2 th\u1eafng l\u00f4 xi\u00ean 4: d\u1ef1a v\u00e0o 2 ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c gi\u1ea3i th\u01b0\u1edfng (27 l\u00f4 gi\u1ea3i c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i, 18 l\u00f4 gi\u1ea3i c\u1ee7a c\u00e1c \u0111\u00e0i Mi\u1ec1n Trung v\u00e0 Mi\u1ec1n Nam).<\/p>\n C\u1ea3 4 s\u1ed1 l\u00f4 n\u00e0y ph\u1ea3i tr\u00f9ng v\u1edbi s\u1ed1 l\u00f4 b\u1ea1n ch\u1ecdn.<\/p>\n V\u00ed d\u1ee5: l\u00f4 xi\u00ean 4: 32 \u2013 12 \u2013 35 \u2013 47 c\u1ee7a \u0111\u00e0i H\u00e0 N\u1ed9i. Hay l\u00f4 xi\u00ean 4: 51 \u2013 69 \u2013 00 \u2013 68 c\u1ee7a \u0111\u00e0i mi\u1ec1n Nam<\/p>\n T\u00f9y v\u00e0o t\u1eebng khu v\u1ef1c m\u00e0 c\u00e1ch t\u00ednh tr\u00fang th\u01b0\u1edfng v\u00e0 tr\u1ea3 th\u01b0\u1edfng s\u1ebd kh\u00e1c nhau<\/p>\n K\u1ebft qu\u1ea3 l\u00f4 l\u00e0 nh\u1eefng con s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a 27 gi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 ki\u1ebfn thi\u1ebft. V\u1eady trong t\u1ed5ng s\u1ed1 100 s\u1ed1 t\u1eeb 00 \u0111\u1ebfn 99 th\u00ec c\u00f3 27 s\u1ed1 tr\u00f9ng v\u1edbi k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 ki\u1ebfn thi\u1ebft mi\u1ec1n B\u1eafc. V\u1eady x\u00e1c su\u1ea5t tr\u00fang l\u00f4 s\u1ebd l\u00e0 27%.<\/p>\n N\u1ebfu tr\u01b0\u1eddng h\u1ee3p gi\u1ea3i th\u01b0\u1edfng x\u1ed5 s\u1ed1 kh\u00e1c nhau m\u00e0 s\u1ed1 cu\u1ed1i tr\u00f9ng nhau th\u00ec x\u00e1c su\u1ea5t tr\u00fang l\u00f4 ch\u1ec9 c\u00f2n l\u00e0 23,76%.<\/p>\n T\u1eeb x\u00e1c su\u1ea5t tr\u00fang l\u00f4 s\u1ebd t\u00ednh ra \u0111\u01b0\u1ee3c x\u00e1c su\u1ea5t th\u1eafng l\u00f4 xi\u00ean nh\u01b0 sau:<\/p>\n X\u00e1c su\u1ea5t th\u1eafng l\u00f4 xi\u00ean 2 = 23,76% x 23,76% = 5,6%<\/p>\n X\u00e1c su\u1ea5t th\u1eafng l\u00f4 xi\u00ean 3 = 23,76% x 23,76% x 23,76% = 1,34%<\/p>\n X\u00e1c su\u1ea5t th\u1eafng xi\u00ean 4 = 23,76% x 23,76% x 23,76% x 23,76% = 0,32%. V\u1edbi x\u00e1c su\u1ea5t nh\u1ecf h\u01a1n 1% th\u00ec t\u1ef7 l\u1ec7 th\u1eafng c\u00f2n kh\u00f3 h\u01a1n c\u1ea3 tr\u00fang \u0111\u1ec1.<\/p>\n M\u1eb7c d\u00f9 x\u00e1c su\u1ea5t th\u1eafng l\u00e0 r\u1ea5t l\u1edbn nh\u01b0ng nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i v\u1eabn th\u00edch \u0111\u00e1nh l\u00f4 xi\u00ean 4 h\u01a1n c\u1ea3 b\u1edfi x\u00e1c su\u1ea5t th\u1eafng c\u00e0ng th\u1ea5p, khi tr\u00fang t\u1ec9 l\u1ec7 tr\u1ea3 th\u01b0\u1edfng s\u1ebd c\u00e0ng cao h\u01a1n.<\/p>\n M\u1ed7i c\u00e1ch ch\u01a1i l\u00f4 \u0111\u1ec1 \u0111\u1ec1u c\u00f3 nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u1ec3 t\u00ecm ra quy lu\u1eadt c\u1ee7a nh\u1eefng con s\u1ed1 v\u00e0 l\u00f4 xi\u00ean c\u0169ng v\u1eady, m\u1ed9t s\u1ed1 quy lu\u1eadt d\u01b0\u1edbi \u0111\u00e2y s\u1ebd gi\u00fap b\u1ea1n t\u00ecm ra nh\u1eefng con s\u1ed1 ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u00e1nh \u2013 H\u00f4m tr\u01b0\u1edbc \u0111\u1ec1 v\u1ec1 99 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 33 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc \u0111\u1ec1 v\u1ec1 k\u00e9p 00, 11, 22\u2026.99 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 1 trong nh\u1eefng con l\u00f4 sau : 010, 151, 060, 565. V\u00e0 sau \u0111\u00f3 1 tu\u1ea7n s\u1ebd v\u1ec1 nh\u1eefng con l\u00f4 232, 282, 373, 787.<\/p>\n l\u00f4 xi\u00ean:<\/p>\n \u2013 L\u00f4 ra 51 th\u00ec h\u00f4m sau s\u1ebd ra con 15<\/p>\n \u2013 L\u00f4 \u0111\u1ea7u 7 ho\u1eb7c l\u00f4 \u0111\u00edt 3 c\u00e2m th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 73<\/p>\n \u2013 L\u00f4 ra c\u1ea3 c\u1eb7p 050 ho\u1eb7c h\u00f4m tr\u01b0\u1edbc c\u00f3 1 con \u0111\u00f3 v\u1ec1 th\u00ec h\u00f4m sau s\u1ebd tr\u1ea3 l\u1ea1i 1 con<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc c\u00f3 con l\u00f4 75 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 57<\/p>\n \u2013 C\u00e1c con l\u00f4 hay \u0111i k\u00e8m v\u1edbi nhau: 464 \u2013 232, 25\/52 \u2013 22, 46 \u2013 87, 11 \u2013 55, 44 \u2013 22.<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc ra l\u00f4 65 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 56<\/p>\n \u2013 V\u00e0o th\u1ee9 4, th\u1ee9 6, th\u1ee9 7 con l\u00f4 66 hay ra<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc c\u00f3 con l\u00f4 89 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 3 c\u00e0ng 373<\/p>\n \u2013 V\u00e0o th\u1ee9 2 v\u00e0 th\u1ee9 6 con l\u00f4 97 hay ra<\/p>\n \u2013 V\u00e0o th\u1ee9 7, ch\u1ee7 nh\u1eadt, th\u1ee9 2, th\u1ee9 3 con l\u00f4 33 hay ra<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc c\u00f3 con l\u00f4 45 th\u00ec h\u00f4m sau s\u1ebd v\u1ec1 l\u00f4 595 ho\u1eb7c 86<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc \u0111\u1ec1 v\u1ec1 77 th\u00ec h\u00f4m sau s\u1ebd c\u00f3 con l\u00f4 88<\/p>\n \u2013 Con l\u00f4 47 xu\u1ea5t hi\u1ec7n th\u00ec 3 ng\u00e0y sau s\u1ebd c\u00f3 con l\u00f4 63<\/p>\n \u2013 H\u00f4m tr\u01b0\u1edbc c\u00f3 con l\u00f4 12 th\u00ec h\u00f4m sau s\u1ebd v\u1ec1 con l\u00f4 45, 56 ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i<\/p>\n V\u1edbi nh\u1eefng kinh nghi\u1ec7m l\u00f4 \u0111\u1ec1<\/strong><\/span> v\u1ec1 l\u00f4 xi\u00ean v\u00e0 c\u00e1ch \u0111\u00e1nh tr\u00ean \u0111\u00e2y, hy v\u1ecdng b\u1ea1n s\u1ebd n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c c\u00e1ch ch\u01a1i \u0111\u1ec3 c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c nh\u1eefng con s\u1ed1 th\u00edch h\u1ee3p nh\u1ea5t.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/p>\n
L\u00f4 xi\u00ean l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n
C\u00e1c lo\u1ea1i l\u00f4 xi\u00ean hi\u1ec7n c\u00f3<\/strong><\/span><\/h2>\n
\u2013 L\u00f4 xi\u00ean 2 s\u1ed1<\/span><\/h3>\n
\u2013 L\u00f4 xi\u00ean 3 s\u1ed1<\/span><\/h3>\n
\u2013 L\u00f4 xi\u00ean 4 s\u1ed1<\/span><\/h3>\n
C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 xi\u00ean<\/strong><\/span><\/h2>\n
Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh \u0111\u1ec3 d\u1ec5 tr\u00fang l\u00f4 xi\u00ean<\/strong><\/span><\/h2>\n
TH\u1ea6N T\u00c0I CH\u1ed0T S\u1ed0<\/span><\/h4>\n