Dotty640 Dotty640

18-07-2015
Mathematics

Answered

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?

Verified Answer :

Paweł19 Paweł19

18-07-2015

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

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

The probablity is 80%.

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