Question

Three of the 50 digital video recorders (DVRs) in an inventory are known to be defective. What is the probability that a randomly selected item is defective?What is the probability?

Answer 1

The total number of digital video recorders (DVRs ) are

`=50`

That is the number of sample space will be

`n(S)=50`

The number of defective DVRs is

`=3`

That is,

The number of required outcomes is

`n(R)=3`

The probability that a randomly selected item is defective will be

`\begin{gathered} Pr(D)=(n(R))/(n(S)) \\ Pr(D)=(3)/(50) \end{gathered}`

Hence,

The probability is = 3/50