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单选题 设离散型随机变量X的分布律为
且
,则
A. 
B. 是大于零的实数
C. 
D. 
学科：默认课程
时间：2026-01-14 05:16:17
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题目1单选题
<img src="https://tihai-oss-cloud.itihey.com/img/75ea02424155f895b9680f8c4683342f.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/f1277e5235cf6ca17119d2f6bbbb1317.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/2c3e6a657c2d99cfdd87d345e6f241fc.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/3ef5eed7c9c8452fc13fede6b56270b0.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/e8dd0cfb65ab743d69613fd56ffa4ece.webp">
题目2单选题
<img src="https://tihai-oss-cloud.itihey.com/img/e41a29788b1a5ac2ade76853a22d72a5.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/040d75c6ccd4af06c3732272d5cc880b.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/2e16866deab75a7b9e5eb8d2e36ef973.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/20d6e04c5892af35633e44fcdfe01625.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/efa077c01af6124ffa0f800dc914bdcc.png">
题目3单选题
<img src="https://tihai-oss-cloud.itihey.com/img/072af6d665c6c72079f03dbe6ab71d84.png">A. 1/6B. 1/4C. 1/8D. 1/2
题目4单选题
设随机变量X的概率密度为<img src="https://tihai-oss-cloud.itihey.com/img/d4cbf029cda8d5ab8eb9203ca7943ad9.webp">求随机变量<img src="https://tihai-oss-cloud.itihey.com/img/42bf2effd0bb39b1dd05cf55d2dc28a9.webp">的概率密度A. <img src="https://tihai-oss-cloud.itihey.com/img/10363eed4889eeb2acdc0cf062e0af1d.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/bbb6d2bc65005ffac2f97fcd95be1de9.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/dfde12ae10f444f8f191dba1de06b110.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/fd166c1ca9a163cfffe2e427d6900313.webp">
题目5单选题
P.26习题14(2) <img src="https://tihai-oss-cloud.itihey.com/img/0f97081d03464115b5d136929b205bb7.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/1702bd0faa3f83792f66a50a3751983c.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/66eeb3da5fe8aa0ebef0d87c2d60dda5.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/23ae534a11c0d8bd0a7e8c8bb798c129.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/fa3df2c6a2f64c3026f8a84e574637b1.webp">
题目6单选题
设随机变量X服从参数为<img src="https://tihai-oss-cloud.itihey.com/img/9be158d65aaeb48c0f0417ce7d3e8e98.webp">的泊松分布,且<img src="https://tihai-oss-cloud.itihey.com/img/4c8a745a9e21609a728656b8ca45dd00.webp">,则参数<img src="https://tihai-oss-cloud.itihey.com/img/9118a94304fc94e2b81ae5c39c3ac1a1.webp">=( )A. 4B. 3C. 1D. 2
题目7单选题
口袋中有5个白球,7个黑球和4个红球,从中不返回任取3个,求取出的3个球颜色各不相同的概率A. <img src="https://tihai-oss-cloud.itihey.com/img/23ae534a11c0d8bd0a7e8c8bb798c129.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/fa3df2c6a2f64c3026f8a84e574637b1.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/66eeb3da5fe8aa0ebef0d87c2d60dda5.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/94c28e51e1d550a5045d11628ad13f38.webp">
题目8单选题
P.25习题7 某油漆公司发出17桶油漆,其中白漆10桶、黑漆4桶,红漆3桶.在搬运中所标笺脱落,交货人随意将这些标笺重新贴,问一个定货4桶白漆,3桶黑漆和2桶红漆顾客,按所定的颜色如数得到定货的概率是多少A. <img src="https://tihai-oss-cloud.itihey.com/img/eb06150c4c919bcfde404abf7cfd7bca.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/b331a11878bd443e569a0f6d2ccfedc3.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/f2398cbecf045ec2f63563e6e3918e39.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/6fece96bce3ef33d130c376f2aa020ad.webp">
题目9单选题
设离散型随机变量X的分布律为<img src="https://tihai-oss-cloud.itihey.com/img/f3bb5c09e057217b5cf92860e441f242.webp">且<img src="https://tihai-oss-cloud.itihey.com/img/56a2436795328176c2e28a54da97dc29.webp">,则<img src="https://tihai-oss-cloud.itihey.com/img/15b4b54665f19f300f94c9bc389ad798.webp">A. <img src="https://tihai-oss-cloud.itihey.com/img/0a8797eb4c8d9dbf247bec3ceebc06cb.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/15b4b54665f19f300f94c9bc389ad798.webp">是大于零的实数C. <img src="https://tihai-oss-cloud.itihey.com/img/46a7c7fcafd2d2be595ac53c30069237.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/855bfae25998e2bb9f8f20c0ca1e1703.webp">
题目10单选题
P.26习题14(1) <img src="https://tihai-oss-cloud.itihey.com/img/f8fd49844ac0666aa25b01123c9323ed.png">A. 0.3B. 0.4C. 0.25D. 0.2
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