Dotty640 Dotty640

18-07-2015
Mathematics

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Ten of the 50 digital video recorders in an inventory are known to be defective. what is the probability you randomly select an item that is not defective?

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Paweł19 Paweł19

18-07-2015

10 - are defective
50 - 10 = 40 - aren't defective

[tex]\overline{\overline{A}}= 40 \\ \\ \overline{\overline{\Omega}}=50 \\ \\ P(A)=\dfrac{\overline{\overline{A}}}{\overline{\overline{\Omega}}}=\dfrac{40}{50}=\dfrac{80}{100}=80\%[/tex]

The probablity is 80%.

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