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原题:amanufacturerofcomputerchips(晶片)findsthat1%ofthechipsproducedaredefective(毁坏的).whatistheprobabilitythatoutof8chips,atleast2chipsaredefective?知道答案是0.00269(无限小数)

题目详情
原题:a manufacturer of computer chips(晶片) finds that 1% of the chips produced are defective(毁坏的).what is the probability that out of 8 chips,at least 2 chips are defective?
知道答案是0.00269(无限小数)
▼优质解答
答案和解析
要求至少两个是毁坏的,可以先求一个是毁坏的和没有毁坏的.然后用1减
不知到有没有听懂
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