还是概率,数学英文都好的进a calculator manufacturer checks for defective products by testing 3 calculators out of every lot of 12.if a defective calculator is found,the lot is rejected.a.suppose 2 calculators in a lot are defective.calcula
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![还是概率,数学英文都好的进a calculator manufacturer checks for defective products by testing 3 calculators out of every lot of 12.if a defective calculator is found,the lot is rejected.a.suppose 2 calculators in a lot are defective.calcula](/uploads/image/z/8530888-40-8.jpg?t=%E8%BF%98%E6%98%AF%E6%A6%82%E7%8E%87%2C%E6%95%B0%E5%AD%A6%E8%8B%B1%E6%96%87%E9%83%BD%E5%A5%BD%E7%9A%84%E8%BF%9Ba+calculator+manufacturer+checks+for+defective+products+by+testing+3+calculators+out+of+every+lot+of+12.if+a+defective+calculator+is+found%2Cthe+lot+is+rejected.a.suppose+2+calculators+in+a+lot+are+defective.calcula)
还是概率,数学英文都好的进a calculator manufacturer checks for defective products by testing 3 calculators out of every lot of 12.if a defective calculator is found,the lot is rejected.a.suppose 2 calculators in a lot are defective.calcula
还是概率,数学英文都好的进
a calculator manufacturer checks for defective products by testing 3 calculators out of every lot of 12.if a defective calculator is found,the lot is rejected.
a.suppose 2 calculators in a lot are defective.calculate the probability that the lot will be rejected
b.the quality-control department wants to have at least a 30% chance of rejecting lots that contain only one defective calculator.is calculators in a lot of 12 sufficient?if not why and how to promote.suppose answer with mathematical calculations
第一问我就用,1减去(2选0)乘(10选3)除与(12选3)
第2问.我不太明白究竟要怎么做.达人们给点提示,思路是什么样的
第一问是没什么问题了。
第二问。你的思路是什么样的呢。给说说吧
还是概率,数学英文都好的进a calculator manufacturer checks for defective products by testing 3 calculators out of every lot of 12.if a defective calculator is found,the lot is rejected.a.suppose 2 calculators in a lot are defective.calcula
1.1-10/12*9/11*8/10=5/11
2.1-11/12*10/11*9/10=1/4=25%<30%
思路是一样的,只不过现在变成12个里有1个是次品了