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题目 #13360

UUID
e99dee67-cc11-4739-a9ae-32e17486788c
来源
A中考/2026江苏中考期末数学试卷+答案145.pdf 第 3 页,bbox [31.44, 587.86, 350.64, 782.14]
题型 / 学科
single_choice / math / JUNIOR
知识树
KT_JUNIOR_MATH_STANDARD
难度
难度 2 / 5 简单 · 单一知识点
QA 状态
存疑 / 待修复 重试 0 次,得分 0.925
最终题 ID
-
错误
发布失败: 正式发布门禁:选项内容为空: C

最终题干渲染(f_body 预览)

某技工学校从成绩优秀的3名男同学和2名女同学中, 随机选 【小试2】 取2名同学参加全国实践操作技能大赛, 则选取的2名同 学恰好都是男同学的概率为(). 5
A. \(1 \frac{3}{2}5\)
B. 3 10
C.
D. 5

答案 / 解析

答案(f_answer)

C

解析(f_ways)

设3名男同学分别为A, B, C, 2名女同学分别为d, e, 从成绩优秀的3名男同学和2名女同学中 , 随机选取2名同学参加全国实践技能大赛,基本事件有AB, AC, Ad, Ae, BC, Bd, Be, Cd, Ce, de, 共10种 , 它们是等可能性的, 选取的2名同学恰好都是男同学的事件有AB, AC, BC,共3种 ,所以选取的 2 名同学恰好都是男同学的概率为 _{10}. 故选C. 3 4

原图与资产(0)

该题没有裁出图片资产

审计记录

阶段审计器结果得分依据(简短)
STRUCTURE structure-rule PASS 0.900
FORMULA formula-auditor PASS 1.000
KNOWLEDGE knowledge-auditor WARN -
VISION vision-auditor PASS 0.900
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
SYMBOLIC symbolic-auditor PASS 1.000
COHERENCE coherence-auditor PASS 0.900
QUALITY_GATE quality-gate PASS 0.925
RETRO_REPAIR retro-deterministic FAIL 0.300
RETRO_REPAIR retro-deterministic FAIL 0.300
RETRO_REPAIR retro-deterministic FAIL 0.300
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知识点(0)

无

事件

时间阶段级别消息
2026-09-22 19:34:41PUBLISHERROR发布失败: 正式发布门禁:选项内容为空: C
2026-09-22 19:34:41QAINFOQA: PASS (score=0.925)
2026-09-22 19:33:54FORMULAWARN公式转换未确认,保留原文本: solution