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热门问题

等级	主题	问题	格式化的问题
2101	求标准差	table[[x,P(x)],[5,3],[6,12],[7,15],[8,11],[9,3]]	$\begin{array}{c} x & P (x) \\ 5 & 3 \\ 6 & 12 \\ 7 & 15 \\ 8 & 11 \\ 9 & 3 \end{array}$
2102	求标准差	table[[x,P(x)],[-7.9,0],[-5,6],[-2.5,3.7],[0,0],[5,-2.7],[7.9,-3.8]]	$\begin{array}{c} x & P (x) \\ - 7.9 & 0 \\ - 5 & 6 \\ - 2.5 & 3.7 \\ 0 & 0 \\ 5 & - 2.7 \\ 7.9 & - 3.8 \end{array}$
2103	求标准差	table[[x,P(x)],[1,0.4],[4,0.3],[6,0.4]]	$\begin{array}{c} x & P (x) \\ 1 & 0.4 \\ 4 & 0.3 \\ 6 & 0.4 \end{array}$
2104	求方差	table[[x,P(x)],[0,0.640],[1,0.223],[2,0.090],[3,0.027],[4,0.013],[5,0.007]]	$\begin{array}{c} x & P (x) \\ 0 & 0.64 \\ 1 & 0.223 \\ 2 & 0.09 \\ 3 & 0.027 \\ 4 & 0.013 \\ 5 & 0.007 \end{array}$
2105	求方差	table[[x,P(x)],[0,0.063],[1,0.250],[2,0.375],[3,0.250],[4,0.063]]	$\begin{array}{c} x & P (x) \\ 0 & 0.063 \\ 1 & 0.25 \\ 2 & 0.375 \\ 3 & 0.25 \\ 4 & 0.063 \end{array}$
2106	求方差	table[[x,P(x)],[0,348],[1,555],[2,79],[3,18]]	$\begin{array}{c} x & P (x) \\ 0 & 348 \\ 1 & 555 \\ 2 & 79 \\ 3 & 18 \end{array}$
2107	求方差	table[[x,P(x)],[1,3],[2,4],[5,6],[7,9]]	$\begin{array}{c} x & P (x) \\ 1 & 3 \\ 2 & 4 \\ 5 & 6 \\ 7 & 9 \end{array}$
2108	求方差	table[[x,P(x)],[1,10],[2,20],[3,30],[4,40],[5,50],[6,60],[7,70],[8,80],[9,90],[10,100],[11,110],[12,120],[13,130],[14,140],[15,150],[16,160]]	$\begin{array}{c} x & P (x) \\ 1 & 10 \\ 2 & 20 \\ 3 & 30 \\ 4 & 40 \\ 5 & 50 \\ 6 & 60 \\ 7 & 70 \\ 8 & 80 \\ 9 & 90 \\ 10 & 100 \\ 11 & 110 \\ 12 & 120 \\ 13 & 130 \\ 14 & 140 \\ 15 & 150 \\ 16 & 160 \end{array}$
2109	求方差	table[[x,P(x)],[1,1],[2,2],[3,3],[4,4],[5,5]]	$\begin{array}{c} x & P (x) \\ 1 & 1 \\ 2 & 2 \\ 3 & 3 \\ 4 & 4 \\ 5 & 5 \end{array}$
2110	求方差	table[[x,P(x)],[1,-13],[2,-31],[3,-59],[4,-97],[5,-146]]	$\begin{array}{c} x & P (x) \\ 1 & - 13 \\ 2 & - 31 \\ 3 & - 59 \\ 4 & - 97 \\ 5 & - 146 \end{array}$
2111	求方差	table[[x,P(x)],[1,2],[2,4],[3,6],[4,8],[5,10]]	$\begin{array}{c} x & P (x) \\ 1 & 2 \\ 2 & 4 \\ 3 & 6 \\ 4 & 8 \\ 5 & 10 \end{array}$
2112	求方差	table[[x,P(x)],[1,3],[2,6],[5,20],[7,55],[22,233]]	$\begin{array}{c} x & P (x) \\ 1 & 3 \\ 2 & 6 \\ 5 & 20 \\ 7 & 55 \\ 22 & 233 \end{array}$
2113	求方差	table[[x,P(x)],[1,0.24],[3,0.17]]	$\begin{array}{c} x & P (x) \\ 1 & 0.24 \\ 3 & 0.17 \end{array}$
2114	求方差	table[[x,P(x)],[18,0.2],[19,0.1],[20,0.3],[21,0.2],[22,0.2]]	$\begin{array}{c} x & P (x) \\ 18 & 0.2 \\ 19 & 0.1 \\ 20 & 0.3 \\ 21 & 0.2 \\ 22 & 0.2 \end{array}$
2115	求方差	table[[x,P(x)],[2,45],[3,135],[4,405],[5,1215],[6,3645]]	$\begin{array}{c} x & P (x) \\ 2 & 45 \\ 3 & 135 \\ 4 & 405 \\ 5 & 1215 \\ 6 & 3645 \end{array}$
2116	求方差	table[[x,P(x)],[2,2/10],[3,3/10],[5,5/10]]	$\begin{array}{c} x & P (x) \\ 2 & \frac{2}{10} \\ 3 & \frac{3}{10} \\ 5 & \frac{5}{10} \end{array}$
2117	求方差	table[[x,P(x)],[2,4],[4,8],[6,12],[8,16],[10,20]]	$\begin{array}{c} x & P (x) \\ 2 & 4 \\ 4 & 8 \\ 6 & 12 \\ 8 & 16 \\ 10 & 20 \end{array}$
2118	求方差	table[[x,P(x)],[6,0.2],[9,0.2],[13,0.3],[16,0.4]]	$\begin{array}{c} x & P (x) \\ 6 & 0.2 \\ 9 & 0.2 \\ 13 & 0.3 \\ 16 & 0.4 \end{array}$
2119	求方差	2 , 1 , 9 , 15 , 7 , 9 , 9 , 18 , 5	$2$ , $1$ , $9$ , $15$ , $7$ , $9$ , $9$ , $18$ , $5$
2120	求方差	2 , 2 , 4 , 2 , 1	$2$ , $2$ , $4$ , $2$ , $1$
2121	求方差	2 , 4 , 4.5 , 6 , 7.3 , 7.9 , 9 , 10 , 30	$2$ , $4$ , $4.5$ , $6$ , $7.3$ , $7.9$ , $9$ , $10$ , $30$
2122	求方差	-2 , -4 , -8 , -16	$- 2$ , $- 4$ , $- 8$ , $- 16$
2123	求方差	20 , 12 , 6 , 7 , 11	$20$ , $12$ , $6$ , $7$ , $11$
2124	求方差	20 , 5 , 5 , 14 , 8 , 19 , 18 , 12 , 19 , 6	$20$ , $5$ , $5$ , $14$ , $8$ , $19$ , $18$ , $12$ , $19$ , $6$
2125	求方差	20.3 , 21.9 , 22.1 , 22.3 , 20.2 , 18.9 , 18.8 , 19.5 , 18.4 , 19.1	$20.3$ , $21.9$ , $22.1$ , $22.3$ , $20.2$ , $18.9$ , $18.8$ , $19.5$ , $18.4$ , $19.1$
2126	求方差	208 , 139 , 155 , 161 , 101 , 132 , 272 , 113 , 172	$208$ , $139$ , $155$ , $161$ , $101$ , $132$ , $272$ , $113$ , $172$
2127	求方差	219 , 177 , 181 , 287 , 194 , 123 , 247 , 232 , 126	$219$ , $177$ , $181$ , $287$ , $194$ , $123$ , $247$ , $232$ , $126$
2128	求方差	-23 , -17 , -19 , -5 , -4 , -11 , -31	$- 23$ , $- 17$ , $- 19$ , $- 5$ , $- 4$ , $- 11$ , $- 31$
2129	求方差	26 , 6.6	$26$ , $6.6$
2130	求方差	3(30) , 5(45) , 7(70) , 9(55) , 11(10)	$3 (30)$ , $5 (45)$ , $7 (70)$ , $9 (55)$ , $11 (10)$
2131	求方差	3 , 3.6 , 4.32 , 5.184	$3$ , $3.6$ , $4.32$ , $5.184$
2132	求方差	3 , 8 , 13 , 18	$3$ , $8$ , $13$ , $18$
2133	求方差	30 , 30 , 30 , 40 , 40	$30$ , $30$ , $30$ , $40$ , $40$
2134	求方差	30 , 48 , 49 , 54 , 55 , 58 , 61 , 61	$30$ , $48$ , $49$ , $54$ , $55$ , $58$ , $61$ , $61$
2135	求方差	300 , 300 , 360 , 290 , 300	$300$ , $300$ , $360$ , $290$ , $300$
2136	求方差	32.4 , 31.5 , 31.1 , 29.4 , 30.8 , 33.5 , 34.4 , 32.9 , 32.6 , 29.5	$32.4$ , $31.5$ , $31.1$ , $29.4$ , $30.8$ , $33.5$ , $34.4$ , $32.9$ , $32.6$ , $29.5$
2137	求方差	34 , 34 , 40 , 28 , 34	$34$ , $34$ , $40$ , $28$ , $34$
2138	求方差	38 , 62	$38$ , $62$
2139	求方差	3960 , 4100 , 3200 , 3100 , 2940 , 3820 , 4100 , 4030	$3960$ , $4100$ , $3200$ , $3100$ , $2940$ , $3820$ , $4100$ , $4030$
2140	求方差	4 , 8 , 12 , 18 , 20 , 22 , 26 , 3	$4$ , $8$ , $12$ , $18$ , $20$ , $22$ , $26$ , $3$
2141	求方差	4 , -1/2 , 1/16	$4$ , $- \frac{1}{2}$ , $\frac{1}{16}$
2142	求方差	4 , 5 , 6 , 7 , 8 , 9 , 9 , 10 , 12 , 12 , 14 , 16 , 17 , 17 , 19	$4$ , $5$ , $6$ , $7$ , $8$ , $9$ , $9$ , $10$ , $12$ , $12$ , $14$ , $16$ , $17$ , $17$ , $19$
2143	求方差	4.85 , 5.10 , 5.50 , 4.75 , 4.50 , 5.00 , 6.00	$4.85$ , $5.1$ , $5.5$ , $4.75$ , $4.5$ , $5$ , $6$
2144	求方差	415 , 457 , 409 , 237	$415$ , $457$ , $409$ , $237$
2145	求方差	42 , 42 , 44 , 44 , 45 , 47 , 48 , 49 , 51 , 58 , 60 , 65	$42$ , $42$ , $44$ , $44$ , $45$ , $47$ , $48$ , $49$ , $51$ , $58$ , $60$ , $65$
2146	求方差	44 , 10 , 31 , 23 , 12 , 53 , 79	$44$ , $10$ , $31$ , $23$ , $12$ , $53$ , $79$
2147	求方差	46 , 38 , 46 , 38 , 42	$46$ , $38$ , $46$ , $38$ , $42$
2148	求值域	2 , 4 , 7 , 11	$2$ , $4$ , $7$ , $11$
2149	求值域	2.50 , 1.50 , 1.75 , 0.00 , 2.00	$2.5$ , $1.5$ , $1.75$ , $0$ , $2$
2150	求值域	23 , 56 , 60 , 123 , 164 , 180 , 212	$23$ , $56$ , $60$ , $123$ , $164$ , $180$ , $212$
2151	求值域	25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40	$25$ , $26$ , $27$ , $28$ , $29$ , $30$ , $31$ , $32$ , $33$ , $34$ , $35$ , $36$ , $37$ , $38$ , $39$ , $40$
2152	求值域	30 , 31 , 31 , 32 , 32	$30$ , $31$ , $31$ , $32$ , $32$
2153	求值域	31 , 27 , 31 , 27 , 29	$31$ , $27$ , $31$ , $27$ , $29$
2154	求值域	3960 , 4100 , 3200 , 3100 , 2940 , 3820 , 4100 , 4030	$3960$ , $4100$ , $3200$ , $3100$ , $2940$ , $3820$ , $4100$ , $4030$
2155	求值域	4 , 1 , 3 , -2 , 5 , -7 , 12 , -19 , 31	$4$ , $1$ , $3$ , $- 2$ , $5$ , $- 7$ , $12$ , $- 19$ , $31$
2156	求值域	42 , 46 , 50 , 38 , 44	$42$ , $46$ , $50$ , $38$ , $44$
2157	求值域	43 , 37 , 38 , 41 , 41	$43$ , $37$ , $38$ , $41$ , $41$
2158	求值域	46 , 44 , 40 , 49 , 46	$46$ , $44$ , $40$ , $49$ , $46$
2159	求值域	-5 , 3	$- 5$ , $3$
2160	求值域	52 , 149 , 15 , 115 , 170	$52$ , $149$ , $15$ , $115$ , $170$
2161	求值域	6 , 10 , 6 , 10 , 10 , 13 , 15	$6$ , $10$ , $6$ , $10$ , $10$ , $13$ , $15$
2162	求值域	6 , 12 , 15 , 22 , 18 , 14 , 8 , 17	$6$ , $12$ , $15$ , $22$ , $18$ , $14$ , $8$ , $17$
2163	求值域	6 , 5 , 13 , 8 , 11 , 19 , 16 , 17 , 9	$6$ , $5$ , $13$ , $8$ , $11$ , $19$ , $16$ , $17$ , $9$
2164	求值域	70 , 12 , 42 , 45 , 50 , 51 , 60 , 69 , 8 , 40 , 18	$70$ , $12$ , $42$ , $45$ , $50$ , $51$ , $60$ , $69$ , $8$ , $40$ , $18$
2165	求值域	75 , 72 , 74 , 40 , 77 , 70 , 80 , 68	$75$ , $72$ , $74$ , $40$ , $77$ , $70$ , $80$ , $68$
2166	求值域	78 , 0 , 0 , 0	$78$ , $0$ , $0$ , $0$
2167	求值域	8 , 13 , 18 , 12 , 6 , 1 , 15 , 2	$8$ , $13$ , $18$ , $12$ , $6$ , $1$ , $15$ , $2$
2168	求方差	8 , 47 , 10 , 50 , 38 , 23 , 28 , 27 , 34 , 28	$8$ , $47$ , $10$ , $50$ , $38$ , $23$ , $28$ , $27$ , $34$ , $28$
2169	求方差	8 , 16 , 20 , 20 , 24 , 32	$8$ , $16$ , $20$ , $20$ , $24$ , $32$
2170	求方差	84.19 , 84.57 , 85.87 , 85.98 , 84.74 , 85.01 , 84.46 , 85.75 , 84.25	$84.19$ , $84.57$ , $85.87$ , $85.98$ , $84.74$ , $85.01$ , $84.46$ , $85.75$ , $84.25$
2171	求方差	9 , 15 , 15 , 10 , 11	$9$ , $15$ , $15$ , $10$ , $11$
2172	求方差	9 , 5 , 6 , 11 , 6 , 10 , 7	$9$ , $5$ , $6$ , $11$ , $6$ , $10$ , $7$
2173	求出期望值	table[[x,P(x)],[0,1387],[1,408],[2,168],[3,43],[4,26],[5,11]]	$\begin{array}{c} x & P (x) \\ 0 & 1387 \\ 1 & 408 \\ 2 & 168 \\ 3 & 43 \\ 4 & 26 \\ 5 & 11 \end{array}$
2174	求出期望值	table[[x,P(x)],[0,3],[1,3/2],[2,3/4],[3,3/8],[5,x]]	$\begin{array}{c} x & P (x) \\ 0 & 3 \\ 1 & \frac{3}{2} \\ 2 & \frac{3}{4} \\ 3 & \frac{3}{8} \\ 5 & x \end{array}$
2175	求出期望值	table[[x,P(x)],[0,21.5],[10,31.5],[14,36.6],[15,38.0],[16,39.5],[17,41.0],[18,42.6],[19,44.3],[20,46.0]]	$\begin{array}{c} x & P (x) \\ 0 & 21.5 \\ 10 & 31.5 \\ 14 & 36.6 \\ 15 & 38 \\ 16 & 39.5 \\ 17 & 41 \\ 18 & 42.6 \\ 19 & 44.3 \\ 20 & 46 \end{array}$
2176	求出期望值	table[[x,P(x)],[1,0.33],[2,0.36],[3,0.21],[4,0.24],[5,0.15]]	$\begin{array}{c} x & P (x) \\ 1 & 0.33 \\ 2 & 0.36 \\ 3 & 0.21 \\ 4 & 0.24 \\ 5 & 0.15 \end{array}$
2177	求出期望值	table[[x,P(x)],[1,0.15],[2,0.2],[3,0.25],[4,0.05],[5,0.35]]	$\begin{array}{c} x & P (x) \\ 1 & 0.15 \\ 2 & 0.2 \\ 3 & 0.25 \\ 4 & 0.05 \\ 5 & 0.35 \end{array}$
2178	求出期望值	table[[x,P(x)],[1,2],[2,4],[3,6],[4,8],[5,10]]	$\begin{array}{c} x & P (x) \\ 1 & 2 \\ 2 & 4 \\ 3 & 6 \\ 4 & 8 \\ 5 & 10 \end{array}$
2179	求出期望值	table[[x,P(x)],[1,0.29],[2,0.45],[3,0.12],[4,0.14]]	$\begin{array}{c} x & P (x) \\ 1 & 0.29 \\ 2 & 0.45 \\ 3 & 0.12 \\ 4 & 0.14 \end{array}$
2180	求出期望值	table[[x,P(x)],[-1,3/2],[0,3],[1,6],[2,12]]	$\begin{array}{c} x & P (x) \\ - 1 & \frac{3}{2} \\ 0 & 3 \\ 1 & 6 \\ 2 & 12 \end{array}$
2181	求出期望值	table[[x,P(x)],[1,6],[2,9],[3,14],[4,21]]	$\begin{array}{c} x & P (x) \\ 1 & 6 \\ 2 & 9 \\ 3 & 14 \\ 4 & 21 \end{array}$
2182	求出期望值	table[[x,P(x)],[12,6],[21,7],[28,8],[37,29],[40,35],[43,45],[38,12]]	$\begin{array}{c} x & P (x) \\ 12 & 6 \\ 21 & 7 \\ 28 & 8 \\ 37 & 29 \\ 40 & 35 \\ 43 & 45 \\ 38 & 12 \end{array}$
2183	求出期望值	table[[x,P(x)],[13,2],[19,9],[26,10],[29,20],[34,10]]	$\begin{array}{c} x & P (x) \\ 13 & 2 \\ 19 & 9 \\ 26 & 10 \\ 29 & 20 \\ 34 & 10 \end{array}$
2184	求出期望值	table[[x,3P(x)-1],[3,3],[2,2],[1,1],[0,0],[-1,-1],[-2,-2],[-3,-3]]	$\begin{array}{c} x & 3 P (x) - 1 \\ 3 & 3 \\ 2 & 2 \\ 1 & 1 \\ 0 & 0 \\ - 1 & - 1 \\ - 2 & - 2 \\ - 3 & - 3 \end{array}$
2185	求出期望值	table[[x,P(x)],[3,0.14],[6,0.34],[9,0.36],[12,0.06],[15,0.10]]	$\begin{array}{c} x & P (x) \\ 3 & 0.14 \\ 6 & 0.34 \\ 9 & 0.36 \\ 12 & 0.06 \\ 15 & 0.1 \end{array}$
2186	求出期望值	table[[x,P(x)],[3,0.01],[6,0.17],[9,0.18],[12,0.49],[15,0.01]]	$\begin{array}{c} x & P (x) \\ 3 & 0.01 \\ 6 & 0.17 \\ 9 & 0.18 \\ 12 & 0.49 \\ 15 & 0.01 \end{array}$
2187	求出期望值	table[[x,P(x)],[5,2],[3,4],[6,5]]	$\begin{array}{c} x & P (x) \\ 5 & 2 \\ 3 & 4 \\ 6 & 5 \end{array}$
2188	求出期望值	table[[x,P(x)],[5,3],[6,12],[7,15],[8,11],[9,3]]	$\begin{array}{c} x & P (x) \\ 5 & 3 \\ 6 & 12 \\ 7 & 15 \\ 8 & 11 \\ 9 & 3 \end{array}$
2189	求出期望值	table[[x,P(x)],[8,9],[9,6],[5,55],[89,54],[97,24]]	$\begin{array}{c} x & P (x) \\ 8 & 9 \\ 9 & 6 \\ 5 & 55 \\ 89 & 54 \\ 97 & 24 \end{array}$
2190	求出期望值	table[[x,P(x)],[0,0.15],[1,0.16],[2,0.2],[3,0.39],[4,0.25]]	$\begin{array}{c} x & P (x) \\ 0 & 0.15 \\ 1 & 0.16 \\ 2 & 0.2 \\ 3 & 0.39 \\ 4 & 0.25 \end{array}$
2191	求出期望值	table[[x,P(x)],[0,0.60],[1,0.60],[2,0.60],[3,0.60]]	$\begin{array}{c} x & P (x) \\ 0 & 0.6 \\ 1 & 0.6 \\ 2 & 0.6 \\ 3 & 0.6 \end{array}$
2192	求出期望值	table[[x,P(x)],[0,0.12],[1,0.22],[2,0.17],[3,0.13],[4,0.11],[5,0.10],[6,0.13],[7,0.02]]	$\begin{array}{c} x & P (x) \\ 0 & 0.12 \\ 1 & 0.22 \\ 2 & 0.17 \\ 3 & 0.13 \\ 4 & 0.11 \\ 5 & 0.1 \\ 6 & 0.13 \\ 7 & 0.02 \end{array}$
2193	求出期望值	table[[x,P(x)],[0,55],[4,57.1],[9,61.8],[15,67.9],[20,71]]	$\begin{array}{c} x & P (x) \\ 0 & 55 \\ 4 & 57.1 \\ 9 & 61.8 \\ 15 & 67.9 \\ 20 & 71 \end{array}$
2194	求出期望值	table[[x,P(x)],[0.5,0.70],[1,1.3],[1.5,2.7],[2,5],[2.5,10.6]]	$\begin{array}{c} x & P (x) \\ 0.5 & 0.7 \\ 1 & 1.3 \\ 1.5 & 2.7 \\ 2 & 5 \\ 2.5 & 10.6 \end{array}$
2195	求出期望值	table[[x,P(x)],[1,1/36],[2,2/36],[3,3/36],[4,4/36],[5,5/36]]	$\begin{array}{c} x & P (x) \\ 1 & \frac{1}{36} \\ 2 & \frac{2}{36} \\ 3 & \frac{3}{36} \\ 4 & \frac{4}{36} \\ 5 & \frac{5}{36} \end{array}$
2196	求出期望值	table[[x,P(x)],[1,0.3],[2,0.46],[3,0.12],[4,0.12]]	$\begin{array}{c} x & P (x) \\ 1 & 0.3 \\ 2 & 0.46 \\ 3 & 0.12 \\ 4 & 0.12 \end{array}$
2197	求出期望值	table[[x,P(x)],[0,0.2],[1,0.4],[2,0.3],[3,0.1]]	$\begin{array}{c} x & P (x) \\ 0 & 0.2 \\ 1 & 0.4 \\ 2 & 0.3 \\ 3 & 0.1 \end{array}$
2198	求出期望值	table[[x,P(x)],[1,2],[2,4],[3,6]]	$\begin{array}{c} x & P (x) \\ 1 & 2 \\ 2 & 4 \\ 3 & 6 \end{array}$
2199	求出期望值	table[[x,P(x)],[1,0.1],[2,0.9]]	$\begin{array}{c} x & P (x) \\ 1 & 0.1 \\ 2 & 0.9 \end{array}$
2200	求出期望值	table[[x,P(x)],[11,11-15]]	$\begin{array}{c} x & P (x) \\ 11 & 11 - 15 \end{array}$