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题目 #13309

UUID
da3190b8-6a1a-46ac-9bf3-9ed05dce54ae
来源
A中考/2026江苏中考期末数学试卷+答案140.pdf 第 6 页,bbox [30.0, 150.7, 523.44, 385.79]
题型 / 学科
single_choice / math / JUNIOR
知识树
KT_JUNIOR_MATH_STANDARD
难度
难度 4 / 5 较难 · 跨知识点综合
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,D

最终题干渲染(f_body 预览)

不透明的袋子中装有红, 绿小球各一个, 除颜色外两个小球无其他差别, 从中随机摸出一个小球 ,放回并摇匀,再从中随机摸出一个小球,那么第一次摸到红球、第二次摸到绿球的概率是().
A. \(\frac{1}{4}\frac{3}{3}\)
B. \(\frac{1}{2}\frac{4}{1}\)
C.
D.

答案 / 解析

答案(f_answer)

A

解析(f_ways)

袋子中有红球和绿球各一个,因此每次摸球时,摸到红球或绿球的概率均为\(\frac{1}{2}\)。由于摸出小球后放回并摇匀,两次摸球是相互独立的事件。第一次摸到红球的概率为\(\frac{1}{2}\),第二次摸到绿球的概率也为\(\frac{1}{2}\)。因此,第一次摸到红球且第二次摸到绿球的概率为\(\frac{1}{2} \times \frac{1}{2} = \frac{1}{4}\)。选项A表示\(\frac{1}{4}\),故正确答案为A。

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 -
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
VISION vision-auditor PASS 0.900
SYMBOLIC symbolic-auditor WARN 0.500
COHERENCE coherence-auditor FAIL 0.900
QUALITY_GATE quality-gate FAIL 0.925
SOLVER blind-solver PASS 1.000
CRITIC critic PASS 1.000
COHERENCE coherence-auditor PASS 0.900
SYMBOLIC symbolic-auditor PASS 1.000
AUTO_REPAIR_ATTEMPT answer-repair PASS 1.000
AUTO_REPAIR answer-repair PASS 1.000
VISION vision-auditor PASS 0.950
RETRO_REPAIR retro-deterministic FAIL 0.300
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 19:15:38PUBLISHERROR发布失败: 正式发布门禁:选项内容为空: C,D
2026-09-22 19:15:38QAINFOQA: PASS (score=0.925)
2026-09-22 19:13:28FORMULAWARN公式转换未确认,保留原文本: option_B
2026-09-22 19:12:09FORMULAWARN公式转换未确认,保留原文本: option_A