allearea1501 allearea1501

29-06-2017
Mathematics

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A box contains 23 transistors,6 of which are defective. If 6 are selected at random, find the probility that none are defective ?

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konrad509 konrad509

29-06-2017

[tex]|\Omega|=C(23,6)=\dfrac{23!}{6!17!}=100947\\ |A|=C(17,6)=\dfrac{17!}{6!11!}=12376\\\\ P(A)=\dfrac{12376}{100947}=\dfrac{1768}{14421}[/tex]

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